PHP 8.2.19: segfault at 7f377e872428 (sp 00007ffcd580fec0 error 4)

[drsheep404]

Description

Hi,

sorry for unclear report, I don't know why this happens:

kernel: [269065.088395] php-fpm8.2[2107797]: segfault at 7f377e872428 ip 0000562b0b8d9ebd sp 00007ffcd580fec0 error 4 in php-fpm8.2[562b0b6ba000+309000] likely on CPU 3 (core 3, socket 0) kernel: [269065.088412] Code: 74 7b 48 c1 e3 05 4c 01 e3 48 3b 6b 18 75 36 48 89 d8 5b 5d 41 5c c3 66 0f 1f 44 00 00 48 8b 7b 18 48 85 ff 74 0a 48 8b 45 10 <48> 39 47 10 74 3d 8b 5b 0c 83 fb ff 74 45 48 c1 e3 05 4c 01 e3 48 kernel: [269068.671543] php-fpm8.2[1753950]: segfault at 7f377e86e6d0 ip 0000562b0b8d9ebd sp 00007ffcd580fe50 error 4 in php-fpm8.2[562b0b6ba000+309000] likely on CPU 7 (core 7, socket 0) kernel: [269068.671602] Code: 74 7b 48 c1 e3 05 4c 01 e3 48 3b 6b 18 75 36 48 89 d8 5b 5d 41 5c c3 66 0f 1f 44 00 00 48 8b 7b 18 48 85 ff 74 0a 48 8b 45 10 <48> 39 47 10 74 3d 8b 5b 0c 83 fb ff 74 45 48 c1 e3 05 4c 01 e3 48 kernel: [269069.612500] php-fpm8.2[2108620]: segfault at 7f377e874428 ip 0000562b0b8d9ebd sp 00007ffcd580fec0 error 4 in php-fpm8.2[562b0b6ba000+309000] likely on CPU 8 (core 8, socket 0) kernel: [269069.612515] Code: 74 7b 48 c1 e3 05 4c 01 e3 48 3b 6b 18 75 36 48 89 d8 5b 5d 41 5c c3 66 0f 1f 44 00 00 48 8b 7b 18 48 85 ff 74 0a 48 8b 45 10 <48> 39 47 10 74 3d 8b 5b 0c 83 fb ff 74 45 48 c1 e3 05 4c 01 e3 48 kernel: [269073.181863] php-fpm8.2[1725486]: segfault at 7f377e074428 ip 0000562b0b8d9ebd sp 00007ffcd580fec0 error 4 in php-fpm8.2[562b0b6ba000+309000] likely on CPU 11 (core 11, socket 0) kernel: [269073.181878] Code: 74 7b 48 c1 e3 05 4c 01 e3 48 3b 6b 18 75 36 48 89 d8 5b 5d 41 5c c3 66 0f 1f 44 00 00 48 8b 7b 18 48 85 ff 74 0a 48 8b 45 10 <48> 39 47 10 74 3d 8b 5b 0c 83 fb ff 74 45 48 c1 e3 05 4c 01 e3 48

Someone has an idea?
Using PHP8.2-fpm via nginx.
This isn't an OOM-Killer, system is well balanced, but with very high traffic.
Also all settings are optimized and correct, including opcache.

How I can find out which file or what causes the segfault? How I can better routing to point the issue (if possible?).
I see the most segfault at 7f377e074428 only. But don't find any similar case about this.

Thanks! :)

PHP Version

PHP 8.2.19

Operating System

Debian 12 (bookworm)

[nielsdos]

Some questions:

• Are you using Opcache JIT?
• Does the issue reproduce when disabling Opcache?
• Does it crash randomly or reliably?
• Does it consistently crash if you set the debugging option opcache.protect_memory=1 in your php.ini?
• Can you please share your fpm configuration?

The addresses are not meaningful on their own because of ASLR and the fact that binaries between systems can differ.
Ideally we get a backtrace from gdb.

[alex0107]

Same problem here!

We are already opened a issue at plesk forum. PHP8.0 doesn't have this problem.
https://talk.plesk.com/threads/segfault-error-4-in-php-fpm-likely-on-cpu-4.374374/#post-947178

[alex0107]

• Are you using Opcache JIT?

tested with and without. Same problem

• Does the issue reproduce when disabling Opcache?

Yes. We disabled opcache and had the same error

• Does it crash randomly or reliably?

Randomly. If you fast reload the webpage, then sometimes 503 or 500 appears. I created a crawler and at the first 5 minutes no errors but than randomly 2 or three subpages per Minute

• Does it consistently crash if you set the debugging option opcache.protect_memory=1 in your php.ini?

I will test :)

• Can you please share your fpm configuration?

Thats the inital Settings from plesk. I tested Debian11, Debian12 and Ubuntu24 with inital installation from Plesk. The problem occours through all. I will share my config.

php.ini

[PHP]

;;;;;;;;;;;;;;;;;;;
; About php.ini ;
;;;;;;;;;;;;;;;;;;;
; PHP's initialization file, generally called php.ini, is responsible for
; configuring many of the aspects of PHP's behavior.

; PHP attempts to find and load this configuration from a number of locations.
; The following is a summary of its search order:
; 1. SAPI module specific location.
; 2. The PHPRC environment variable.
; 3. A number of predefined registry keys on Windows
; 4. Current working directory (except CLI)
; 5. The web server's directory (for SAPI modules), or directory of PHP
; (otherwise in Windows)
; 6. The directory from the --with-config-file-path compile time option, or the
; Windows directory (usually C:\windows)
; See the PHP docs for more specific information.
; https://php.net/configuration.file

; The syntax of the file is extremely simple. Whitespace and lines
; beginning with a semicolon are silently ignored (as you probably guessed).
; Section headers (e.g. [Foo]) are also silently ignored, even though
; they might mean something in the future.

; Directives following the section heading [PATH=/www/mysite] only
; apply to PHP files in the /www/mysite directory. Directives
; following the section heading [HOST=www.example.com] only apply to
; PHP files served from www.example.com. Directives set in these
; special sections cannot be overridden by user-defined INI files or
; at runtime. Currently, [PATH=] and [HOST=] sections only work under
; CGI/FastCGI.
; https://php.net/ini.sections

; Directives are specified using the following syntax:
; directive = value
; Directive names are case sensitive - foo=bar is different from FOO=bar.
; Directives are variables used to configure PHP or PHP extensions.
; There is no name validation. If PHP can't find an expected
; directive because it is not set or is mistyped, a default value will be used.

; The value can be a string, a number, a PHP constant (e.g. E_ALL or M_PI), one
; of the INI constants (On, Off, True, False, Yes, No and None) or an expression
; (e.g. E_ALL & ~E_NOTICE), a quoted string ("bar"), or a reference to a
; previously set variable or directive (e.g. ${foo})

; Expressions in the INI file are limited to bitwise operators and parentheses:
; | bitwise OR
; ^ bitwise XOR
; & bitwise AND
; ~ bitwise NOT
; ! boolean NOT

; Boolean flags can be turned on using the values 1, On, True or Yes.
; They can be turned off using the values 0, Off, False or No.

; An empty string can be denoted by simply not writing anything after the equal
; sign, or by using the None keyword:

; foo = ; sets foo to an empty string
; foo = None ; sets foo to an empty string
; foo = "None" ; sets foo to the string 'None'

; If you use constants in your value, and these constants belong to a
; dynamically loaded extension (either a PHP extension or a Zend extension),
; you may only use these constants after the line that loads the extension.

;;;;;;;;;;;;;;;;;;;
; About this file ;
;;;;;;;;;;;;;;;;;;;
; PHP comes packaged with two INI files. One that is recommended to be used
; in production environments and one that is recommended to be used in
; development environments.

; php.ini-production contains settings which hold security, performance and
; best practices at its core. But please be aware, these settings may break
; compatibility with older or less security-conscious applications. We
; recommending using the production ini in production and testing environments.

; php.ini-development is very similar to its production variant, except it is
; much more verbose when it comes to errors. We recommend using the
; development version only in development environments, as errors shown to
; application users can inadvertently leak otherwise secure information.

; This is the php.ini-production INI file.

;;;;;;;;;;;;;;;;;;;
; Quick Reference ;
;;;;;;;;;;;;;;;;;;;

; The following are all the settings which are different in either the production
; or development versions of the INIs with respect to PHP's default behavior.
; Please see the actual settings later in the document for more details as to why
; we recommend these changes in PHP's behavior.

; display_errors
; Default Value: On
; Development Value: On
; Production Value: Off

; display_startup_errors
; Default Value: On
; Development Value: On
; Production Value: Off

; error_reporting
; Default Value: E_ALL
; Development Value: E_ALL
; Production Value: E_ALL & ~E_DEPRECATED & ~E_STRICT

; log_errors
; Default Value: Off
; Development Value: On
; Production Value: On

; max_input_time
; Default Value: -1 (Unlimited)
; Development Value: 60 (60 seconds)
; Production Value: 60 (60 seconds)

; output_buffering
; Default Value: Off
; Development Value: 4096
; Production Value: 4096

; register_argc_argv
; Default Value: On
; Development Value: Off
; Production Value: Off

; request_order
; Default Value: None
; Development Value: "GP"
; Production Value: "GP"

; session.gc_divisor
; Default Value: 100
; Development Value: 1000
; Production Value: 1000

; session.sid_bits_per_character
; Default Value: 4
; Development Value: 5
; Production Value: 5

; session.sid_length
; Default Value: 32
; Development Value: 26
; Production Value: 26

; short_open_tag
; Default Value: On
; Development Value: Off
; Production Value: Off

; variables_order
; Default Value: "EGPCS"
; Development Value: "GPCS"
; Production Value: "GPCS"

; zend.assertions
; Default Value: 1
; Development Value: 1
; Production Value: -1

; zend.exception_ignore_args
; Default Value: Off
; Development Value: Off
; Production Value: On

; zend.exception_string_param_max_len
; Default Value: 15
; Development Value: 15
; Production Value: 0

;;;;;;;;;;;;;;;;;;;;
; php.ini Options ;
;;;;;;;;;;;;;;;;;;;;
; Name for user-defined php.ini (.htaccess) files. Default is ".user.ini"
;user_ini.filename = ".user.ini"

; To disable this feature set this option to an empty value
;user_ini.filename =

; TTL for user-defined php.ini files (time-to-live) in seconds. Default is 300 seconds (5 minutes)
;user_ini.cache_ttl = 300

;;;;;;;;;;;;;;;;;;;;
; Language Options ;
;;;;;;;;;;;;;;;;;;;;

; Enable the PHP scripting language engine under Apache.
; https://php.net/engine
engine = On

; This directive determines whether or not PHP will recognize code between
; tags as PHP source which should be processed as such. It is
; generally recommended that should be used and that this feature
; should be disabled, as enabling it may result in issues when generating XML
; documents, however this remains supported for backward compatibility reasons.
; Note that this directive does not control the <?= shorthand tag, which can be
; used regardless of this directive.
; Default Value: On
; Development Value: Off
; Production Value: Off
; https://php.net/short-open-tag
short_open_tag = Off

; The number of significant digits displayed in floating point numbers.
; https://php.net/precision
precision = 14

; Output buffering is a mechanism for controlling how much output data
; (excluding headers and cookies) PHP should keep internally before pushing that
; data to the client. If your application's output exceeds this setting, PHP
; will send that data in chunks of roughly the size you specify.
; Turning on this setting and managing its maximum buffer size can yield some
; interesting side-effects depending on your application and web server.
; You may be able to send headers and cookies after you've already sent output
; through print or echo. You also may see performance benefits if your server is
; emitting less packets due to buffered output versus PHP streaming the output
; as it gets it. On production servers, 4096 bytes is a good setting for performance
; reasons.
; Note: Output buffering can also be controlled via Output Buffering Control
; functions.
; Possible Values:
; On = Enabled and buffer is unlimited. (Use with caution)
; Off = Disabled
; Integer = Enables the buffer and sets its maximum size in bytes.
; Note: This directive is hardcoded to Off for the CLI SAPI
; Default Value: Off
; Development Value: 4096
; Production Value: 4096
; https://php.net/output-buffering
output_buffering = 4096

; You can redirect all of the output of your scripts to a function. For
; example, if you set output_handler to "mb_output_handler", character
; encoding will be transparently converted to the specified encoding.
; Setting any output handler automatically turns on output buffering.
; Note: People who wrote portable scripts should not depend on this ini
; directive. Instead, explicitly set the output handler using ob_start().
; Using this ini directive may cause problems unless you know what script
; is doing.
; Note: You cannot use both "mb_output_handler" with "ob_iconv_handler"
; and you cannot use both "ob_gzhandler" and "zlib.output_compression".
; Note: output_handler must be empty if this is set 'On' !!!!
; Instead you must use zlib.output_handler.
; https://php.net/output-handler
;output_handler =

; URL rewriter function rewrites URL on the fly by using
; output buffer. You can set target tags by this configuration.
; "form" tag is special tag. It will add hidden input tag to pass values.
; Refer to session.trans_sid_tags for usage.
; Default Value: "form="
; Development Value: "form="
; Production Value: "form="
;url_rewriter.tags

; URL rewriter will not rewrite absolute URL nor form by default. To enable
; absolute URL rewrite, allowed hosts must be defined at RUNTIME.
; Refer to session.trans_sid_hosts for more details.
; Default Value: ""
; Development Value: ""
; Production Value: ""
;url_rewriter.hosts

; Transparent output compression using the zlib library
; Valid values for this option are 'off', 'on', or a specific buffer size
; to be used for compression (default is 4KB)
; Note: Resulting chunk size may vary due to nature of compression. PHP
; outputs chunks that are few hundreds bytes each as a result of
; compression. If you prefer a larger chunk size for better
; performance, enable output_buffering in addition.
; Note: You need to use zlib.output_handler instead of the standard
; output_handler, or otherwise the output will be corrupted.
; https://php.net/zlib.output-compression
zlib.output_compression = Off

; https://php.net/zlib.output-compression-level
;zlib.output_compression_level = -1

; You cannot specify additional output handlers if zlib.output_compression
; is activated here. This setting does the same as output_handler but in
; a different order.
; https://php.net/zlib.output-handler
;zlib.output_handler =

; Implicit flush tells PHP to tell the output layer to flush itself
; automatically after every output block. This is equivalent to calling the
; PHP function flush() after each and every call to print() or echo() and each
; and every HTML block. Turning this option on has serious performance
; implications and is generally recommended for debugging purposes only.
; https://php.net/implicit-flush
; Note: This directive is hardcoded to On for the CLI SAPI
implicit_flush = Off

; The unserialize callback function will be called (with the undefined class'
; name as parameter), if the unserializer finds an undefined class
; which should be instantiated. A warning appears if the specified function is
; not defined, or if the function doesn't include/implement the missing class.
; So only set this entry, if you really want to implement such a
; callback-function.
unserialize_callback_func =

; The unserialize_max_depth specifies the default depth limit for unserialized
; structures. Setting the depth limit too high may result in stack overflows
; during unserialization. The unserialize_max_depth ini setting can be
; overridden by the max_depth option on individual unserialize() calls.
; A value of 0 disables the depth limit.
;unserialize_max_depth = 4096

; When floats & doubles are serialized, store serialize_precision significant
; digits after the floating point. The default value ensures that when floats
; are decoded with unserialize, the data will remain the same.
; The value is also used for json_encode when encoding double values.
; If -1 is used, then dtoa mode 0 is used which automatically select the best
; precision.
serialize_precision = -1

; open_basedir, if set, limits all file operations to the defined directory
; and below. This directive makes most sense if used in a per-directory
; or per-virtualhost web server configuration file.
; Note: disables the realpath cache
; https://php.net/open-basedir
;open_basedir =

; This directive allows you to disable certain functions.
; It receives a comma-delimited list of function names.
; https://php.net/disable-functions
disable_functions =

; This directive allows you to disable certain classes.
; It receives a comma-delimited list of class names.
; https://php.net/disable-classes
disable_classes =

; Colors for Syntax Highlighting mode. Anything that's acceptable in
; would work.
; https://php.net/syntax-highlighting
;highlight.string = #DD0000
;highlight.comment = #FF9900
;highlight.keyword = #7700
;highlight.default = #0000BB
;highlight.html = #000000

; If enabled, the request will be allowed to complete even if the user aborts
; the request. Consider enabling it if executing long requests, which may end up
; being interrupted by the user or a browser timing out. PHP's default behavior
; is to disable this feature.
; https://php.net/ignore-user-abort
;ignore_user_abort = On

; Determines the size of the realpath cache to be used by PHP. This value should
; be increased on systems where PHP opens many files to reflect the quantity of
; the file operations performed.
; Note: if open_basedir is set, the cache is disabled
; https://php.net/realpath-cache-size
;realpath_cache_size = 4096k

; Duration of time, in seconds for which to cache realpath information for a given
; file or directory. For systems with rarely changing files, consider increasing this
; value.
; https://php.net/realpath-cache-ttl
;realpath_cache_ttl = 120

; Enables or disables the circular reference collector.
; https://php.net/zend.enable-gc
zend.enable_gc = On

; If enabled, scripts may be written in encodings that are incompatible with
; the scanner. CP936, Big5, CP949 and Shift_JIS are the examples of such
; encodings. To use this feature, mbstring extension must be enabled.
;zend.multibyte = Off

; Allows to set the default encoding for the scripts. This value will be used
; unless "declare(encoding=...)" directive appears at the top of the script.
; Only affects if zend.multibyte is set.
;zend.script_encoding =

; Allows to include or exclude arguments from stack traces generated for exceptions.
; In production, it is recommended to turn this setting on to prohibit the output
; of sensitive information in stack traces
; Default Value: Off
; Development Value: Off
; Production Value: On
zend.exception_ignore_args = On

; Allows setting the maximum string length in an argument of a stringified stack trace
; to a value between 0 and 1000000.
; This has no effect when zend.exception_ignore_args is enabled.
; Default Value: 15
; Development Value: 15
; Production Value: 0
; In production, it is recommended to set this to 0 to reduce the output
; of sensitive information in stack traces.
zend.exception_string_param_max_len = 0

;;;;;;;;;;;;;;;;;
; Miscellaneous ;
;;;;;;;;;;;;;;;;;

; Decides whether PHP may expose the fact that it is installed on the server
; (e.g. by adding its signature to the Web server header). It is no security
; threat in any way, but it makes it possible to determine whether you use PHP
; on your server or not.
; https://php.net/expose-php
expose_php = On

;;;;;;;;;;;;;;;;;;;
; Resource Limits ;
;;;;;;;;;;;;;;;;;;;

; Maximum execution time of each script, in seconds
; https://php.net/max-execution-time
; Note: This directive is hardcoded to 0 for the CLI SAPI
max_execution_time = 30

; Maximum amount of time each script may spend parsing request data. It's a good
; idea to limit this time on productions servers in order to eliminate unexpectedly
; long running scripts.
; Note: This directive is hardcoded to -1 for the CLI SAPI
; Default Value: -1 (Unlimited)
; Development Value: 60 (60 seconds)
; Production Value: 60 (60 seconds)
; https://php.net/max-input-time
max_input_time = 60

; Maximum input variable nesting level
; https://php.net/max-input-nesting-level
;max_input_nesting_level = 64

; How many GET/POST/COOKIE input variables may be accepted
;max_input_vars = 1000

; How many multipart body parts (combined input variable and file uploads) may
; be accepted.
; Default Value: -1 (Sum of max_input_vars and max_file_uploads)
;max_multipart_body_parts = 1500

; Maximum amount of memory a script may consume
; https://php.net/memory-limit
memory_limit = 128M

;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
; Error handling and logging ;
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;

; This directive informs PHP of which errors, warnings and notices you would like
; it to take action for. The recommended way of setting values for this
; directive is through the use of the error level constants and bitwise
; operators. The error level constants are below here for convenience as well as
; some common settings and their meanings.
; By default, PHP is set to take action on all errors, notices and warnings EXCEPT
; those related to E_NOTICE and E_STRICT, which together cover best practices and
; recommended coding standards in PHP. For performance reasons, this is the
; recommend error reporting setting. Your production server shouldn't be wasting
; resources complaining about best practices and coding standards. That's what
; development servers and development settings are for.
; Note: The php.ini-development file has this setting as E_ALL. This
; means it pretty much reports everything which is exactly what you want during
; development and early testing.
;
; Error Level Constants:
; E_ALL - All errors and warnings
; E_ERROR - fatal run-time errors
; E_RECOVERABLE_ERROR - almost fatal run-time errors
; E_WARNING - run-time warnings (non-fatal errors)
; E_PARSE - compile-time parse errors
; E_NOTICE - run-time notices (these are warnings which often result
; from a bug in your code, but it's possible that it was
; intentional (e.g., using an uninitialized variable and
; relying on the fact it is automatically initialized to an
; empty string)
; E_STRICT - run-time notices, enable to have PHP suggest changes
; to your code which will ensure the best interoperability
; and forward compatibility of your code
; E_CORE_ERROR - fatal errors that occur during PHP's initial startup
; E_CORE_WARNING - warnings (non-fatal errors) that occur during PHP's
; initial startup
; E_COMPILE_ERROR - fatal compile-time errors
; E_COMPILE_WARNING - compile-time warnings (non-fatal errors)
; E_USER_ERROR - user-generated error message
; E_USER_WARNING - user-generated warning message
; E_USER_NOTICE - user-generated notice message
; E_DEPRECATED - warn about code that will not work in future versions
; of PHP
; E_USER_DEPRECATED - user-generated deprecation warnings
;
; Common Values:
; E_ALL (Show all errors, warnings and notices including coding standards.)
; E_ALL & ~E_NOTICE (Show all errors, except for notices)
; E_ALL & ~E_NOTICE & ~E_STRICT (Show all errors, except for notices and coding standards warnings.)
; E_COMPILE_ERROR|E_RECOVERABLE_ERROR|E_ERROR|E_CORE_ERROR (Show only errors)
; Default Value: E_ALL
; Development Value: E_ALL
; Production Value: E_ALL & ~E_DEPRECATED & ~E_STRICT
; https://php.net/error-reporting
error_reporting = E_ALL & ~E_DEPRECATED & ~E_STRICT

; This directive controls whether or not and where PHP will output errors,
; notices and warnings too. Error output is very useful during development, but
; it could be very dangerous in production environments. Depending on the code
; which is triggering the error, sensitive information could potentially leak
; out of your application such as database usernames and passwords or worse.
; For production environments, we recommend logging errors rather than
; sending them to STDOUT.
; Possible Values:
; Off = Do not display any errors
; stderr = Display errors to STDERR (affects only CGI/CLI binaries!)
; On or stdout = Display errors to STDOUT
; Default Value: On
; Development Value: On
; Production Value: Off
; https://php.net/display-errors
display_errors = Off

; The display of errors which occur during PHP's startup sequence are handled
; separately from display_errors. We strongly recommend you set this to 'off'
; for production servers to avoid leaking configuration details.
; Default Value: On
; Development Value: On
; Production Value: Off
; https://php.net/display-startup-errors
display_startup_errors = Off

; Besides displaying errors, PHP can also log errors to locations such as a
; server-specific log, STDERR, or a location specified by the error_log
; directive found below. While errors should not be displayed on productions
; servers they should still be monitored and logging is a great way to do that.
; Default Value: Off
; Development Value: On
; Production Value: On
; https://php.net/log-errors
log_errors = On

; Do not log repeated messages. Repeated errors must occur in same file on same
; line unless ignore_repeated_source is set true.
; https://php.net/ignore-repeated-errors
ignore_repeated_errors = Off

; Ignore source of message when ignoring repeated messages. When this setting
; is On you will not log errors with repeated messages from different files or
; source lines.
; https://php.net/ignore-repeated-source
ignore_repeated_source = Off

; If this parameter is set to Off, then memory leaks will not be shown (on
; stdout or in the log). This is only effective in a debug compile, and if
; error reporting includes E_WARNING in the allowed list
; https://php.net/report-memleaks
report_memleaks = On

; This setting is off by default.
;report_zend_debug = 0

; Turn off normal error reporting and emit XML-RPC error XML
; https://php.net/xmlrpc-errors
;xmlrpc_errors = 0

; An XML-RPC faultCode
;xmlrpc_error_number = 0

; When PHP displays or logs an error, it has the capability of formatting the
; error message as HTML for easier reading. This directive controls whether
; the error message is formatted as HTML or not.
; Note: This directive is hardcoded to Off for the CLI SAPI
; https://php.net/html-errors
;html_errors = On

; If html_errors is set to On and docref_root is not empty, then PHP
; produces clickable error messages that direct to a page describing the error
; or function causing the error in detail.
; You can download a copy of the PHP manual from https://php.net/docs
; and change docref_root to the base URL of your local copy including the
; leading '/'. You must also specify the file extension being used including
; the dot. PHP's default behavior is to leave these settings empty, in which
; case no links to documentation are generated.
; Note: Never use this feature for production boxes.
; https://php.net/docref-root
; Examples
;docref_root = "/phpmanual/"

; https://php.net/docref-ext
;docref_ext = .html

; String to output before an error message. PHP's default behavior is to leave
; this setting blank.
; https://php.net/error-prepend-string
; Example:
;error_prepend_string = ""

; String to output after an error message. PHP's default behavior is to leave
; this setting blank.
; https://php.net/error-append-string
; Example:
;error_append_string = ""

; Log errors to specified file. PHP's default behavior is to leave this value
; empty.
; https://php.net/error-log
; Example:
;error_log = php_errors.log
; Log errors to syslog (Event Log on Windows).
;error_log = syslog

; The syslog ident is a string which is prepended to every message logged
; to syslog. Only used when error_log is set to syslog.
;syslog.ident = php

; The syslog facility is used to specify what type of program is logging
; the message. Only used when error_log is set to syslog.
;syslog.facility = user

; Set this to disable filtering control characters (the default).
; Some loggers only accept NVT-ASCII, others accept anything that's not
; control characters. If your logger accepts everything, then no filtering
; is needed at all.
; Allowed values are:
; ascii (all printable ASCII characters and NL)
; no-ctrl (all characters except control characters)
; all (all characters)
; raw (like "all", but messages are not split at newlines)
; https://php.net/syslog.filter
;syslog.filter = ascii

;windows.show_crt_warning
; Default value: 0
; Development value: 0
; Production value: 0

;;;;;;;;;;;;;;;;;
; Data Handling ;
;;;;;;;;;;;;;;;;;

; The separator used in PHP generated URLs to separate arguments.
; PHP's default setting is "&".
; https://php.net/arg-separator.output
; Example:
;arg_separator.output = "&"

; List of separator(s) used by PHP to parse input URLs into variables.
; PHP's default setting is "&".
; NOTE: Every character in this directive is considered as separator!
; https://php.net/arg-separator.input
; Example:
;arg_separator.input = ";&"

; This directive determines which super global arrays are registered when PHP
; starts up. G,P,C,E & S are abbreviations for the following respective super
; globals: GET, POST, COOKIE, ENV and SERVER. There is a performance penalty
; paid for the registration of these arrays and because ENV is not as commonly
; used as the others, ENV is not recommended on productions servers. You
; can still get access to the environment variables through getenv() should you
; need to.
; Default Value: "EGPCS"
; Development Value: "GPCS"
; Production Value: "GPCS";
; https://php.net/variables-order
variables_order = "GPCS"

; This directive determines which super global data (G,P & C) should be
; registered into the super global array REQUEST. If so, it also determines
; the order in which that data is registered. The values for this directive
; are specified in the same manner as the variables_order directive,
; EXCEPT one. Leaving this value empty will cause PHP to use the value set
; in the variables_order directive. It does not mean it will leave the super
; globals array REQUEST empty.
; Default Value: None
; Development Value: "GP"
; Production Value: "GP"
; https://php.net/request-order
request_order = "GP"

; This directive determines whether PHP registers $argv & $argc each time it
; runs. $argv contains an array of all the arguments passed to PHP when a script
; is invoked. $argc contains an integer representing the number of arguments
; that were passed when the script was invoked. These arrays are extremely
; useful when running scripts from the command line. When this directive is
; enabled, registering these variables consumes CPU cycles and memory each time
; a script is executed. For performance reasons, this feature should be disabled
; on production servers.
; Note: This directive is hardcoded to On for the CLI SAPI
; Default Value: On
; Development Value: Off
; Production Value: Off
; https://php.net/register-argc-argv
register_argc_argv = Off

; When enabled, the ENV, REQUEST and SERVER variables are created when they're
; first used (Just In Time) instead of when the script starts. If these
; variables are not used within a script, having this directive on will result
; in a performance gain. The PHP directive register_argc_argv must be disabled
; for this directive to have any effect.
; https://php.net/auto-globals-jit
auto_globals_jit = On

; Whether PHP will read the POST data.
; This option is enabled by default.
; Most likely, you won't want to disable this option globally. It causes $_POST
; and $_FILES to always be empty; the only way you will be able to read the
; POST data will be through the php://input stream wrapper. This can be useful
; to proxy requests or to process the POST data in a memory efficient fashion.
; https://php.net/enable-post-data-reading
;enable_post_data_reading = Off

; Maximum size of POST data that PHP will accept.
; Its value may be 0 to disable the limit. It is ignored if POST data reading
; is disabled through enable_post_data_reading.
; https://php.net/post-max-size
post_max_size = 8M

; Automatically add files before PHP document.
; https://php.net/auto-prepend-file
auto_prepend_file =

; Automatically add files after PHP document.
; https://php.net/auto-append-file
auto_append_file =

; By default, PHP will output a media type using the Content-Type header. To
; disable this, simply set it to be empty.
;
; PHP's built-in default media type is set to text/html.
; https://php.net/default-mimetype
default_mimetype = "text/html"

; PHP's default character set is set to UTF-8.
; https://php.net/default-charset
default_charset = "UTF-8"

; PHP internal character encoding is set to empty.
; If empty, default_charset is used.
; https://php.net/internal-encoding
;internal_encoding =

; PHP input character encoding is set to empty.
; If empty, default_charset is used.
; https://php.net/input-encoding
;input_encoding =

; PHP output character encoding is set to empty.
; If empty, default_charset is used.
; See also output_buffer.
; https://php.net/output-encoding
;output_encoding =

;;;;;;;;;;;;;;;;;;;;;;;;;
; Paths and Directories ;
;;;;;;;;;;;;;;;;;;;;;;;;;

; UNIX: "/path1:/path2"
;include_path = ".:/php/includes"
;
; Windows: "\path1;\path2"
;include_path = ".;c:\php\includes"
;
; PHP's default setting for include_path is ".;/path/to/php/pear"
; https://php.net/include-path

; The root of the PHP pages, used only if nonempty.
; if PHP was not compiled with FORCE_REDIRECT, you SHOULD set doc_root
; if you are running php as a CGI under any web server (other than IIS)
; see documentation for security issues. The alternate is to use the
; cgi.force_redirect configuration below
; https://php.net/doc-root
doc_root =

; The directory under which PHP opens the script using /~username used only
; if nonempty.
; https://php.net/user-dir
user_dir =

; Directory in which the loadable extensions (modules) reside.
; https://php.net/extension-dir
;extension_dir = "./"
; On windows:
;extension_dir = "ext"

; Directory where the temporary files should be placed.
; Defaults to the system default (see sys_get_temp_dir)
;sys_temp_dir = "/tmp"

; Whether or not to enable the dl() function. The dl() function does NOT work
; properly in multithreaded servers, such as IIS or Zeus, and is automatically
; disabled on them.
; https://php.net/enable-dl
enable_dl = Off

; cgi.force_redirect is necessary to provide security running PHP as a CGI under
; most web servers. Left undefined, PHP turns this on by default. You can
; turn it off here AT YOUR OWN RISK
; You CAN safely turn this off for IIS, in fact, you MUST.
; https://php.net/cgi.force-redirect
;cgi.force_redirect = 1

; if cgi.nph is enabled it will force cgi to always sent Status: 200 with
; every request. PHP's default behavior is to disable this feature.
;cgi.nph = 1

; if cgi.force_redirect is turned on, and you are not running under Apache or Netscape
; (iPlanet) web servers, you MAY need to set an environment variable name that PHP
; will look for to know it is OK to continue execution. Setting this variable MAY
; cause security issues, KNOW WHAT YOU ARE DOING FIRST.
; https://php.net/cgi.redirect-status-env
;cgi.redirect_status_env =

; cgi.fix_pathinfo provides real PATH_INFO/PATH_TRANSLATED support for CGI. PHP's
; previous behaviour was to set PATH_TRANSLATED to SCRIPT_FILENAME, and to not grok
; what PATH_INFO is. For more information on PATH_INFO, see the cgi specs. Setting
; this to 1 will cause PHP CGI to fix its paths to conform to the spec. A setting
; of zero causes PHP to behave as before. Default is 1. You should fix your scripts
; to use SCRIPT_FILENAME rather than PATH_TRANSLATED.
; https://php.net/cgi.fix-pathinfo
;cgi.fix_pathinfo=1

; if cgi.discard_path is enabled, the PHP CGI binary can safely be placed outside
; of the web tree and people will not be able to circumvent .htaccess security.
;cgi.discard_path=1

; FastCGI under IIS supports the ability to impersonate
; security tokens of the calling client. This allows IIS to define the
; security context that the request runs under. mod_fastcgi under Apache
; does not currently support this feature (03/17/2002)
; Set to 1 if running under IIS. Default is zero.
; https://php.net/fastcgi.impersonate
;fastcgi.impersonate = 1

; Disable logging through FastCGI connection. PHP's default behavior is to enable
; this feature.
;fastcgi.logging = 0

; cgi.rfc2616_headers configuration option tells PHP what type of headers to
; use when sending HTTP response code. If set to 0, PHP sends Status: header that
; is supported by Apache. When this option is set to 1, PHP will send
; RFC2616 compliant header.
; Default is zero.
; https://php.net/cgi.rfc2616-headers
;cgi.rfc2616_headers = 0

; cgi.check_shebang_line controls whether CGI PHP checks for line starting with #!
; (shebang) at the top of the running script. This line might be needed if the
; script support running both as stand-alone script and via PHP CGI<. PHP in CGI
; mode skips this line and ignores its content if this directive is turned on.
; https://php.net/cgi.check-shebang-line
;cgi.check_shebang_line=1

;;;;;;;;;;;;;;;;
; File Uploads ;
;;;;;;;;;;;;;;;;

; Whether to allow HTTP file uploads.
; https://php.net/file-uploads
file_uploads = On

; Temporary directory for HTTP uploaded files (will use system default if not
; specified).
; https://php.net/upload-tmp-dir
;upload_tmp_dir =

; Maximum allowed size for uploaded files.
; https://php.net/upload-max-filesize
upload_max_filesize = 2M

; Maximum number of files that can be uploaded via a single request
max_file_uploads = 20

;;;;;;;;;;;;;;;;;;
; Fopen wrappers ;
;;;;;;;;;;;;;;;;;;

; Whether to allow the treatment of URLs (like http:// or ftp://) as files.
; https://php.net/allow-url-fopen
allow_url_fopen = On

; Whether to allow include/require to open URLs (like https:// or ftp://) as files.
; https://php.net/allow-url-include
allow_url_include = Off

; Define the anonymous ftp password (your email address). PHP's default setting
; for this is empty.
; https://php.net/from
;from="john@doe.com"

; Define the User-Agent string. PHP's default setting for this is empty.
; https://php.net/user-agent
;user_agent="PHP"

; Default timeout for socket based streams (seconds)
; https://php.net/default-socket-timeout
default_socket_timeout = 60

; If your scripts have to deal with files from Macintosh systems,
; or you are running on a Mac and need to deal with files from
; unix or win32 systems, setting this flag will cause PHP to
; automatically detect the EOL character in those files so that
; fgets() and file() will work regardless of the source of the file.
; https://php.net/auto-detect-line-endings
;auto_detect_line_endings = Off

;;;;;;;;;;;;;;;;;;;;;;
; Dynamic Extensions ;
;;;;;;;;;;;;;;;;;;;;;;

; If you wish to have an extension loaded automatically, use the following
; syntax:
;
; extension=modulename
;
; For example:
;
; extension=mysqli
;
; When the extension library to load is not located in the default extension
; directory, You may specify an absolute path to the library file:
;
; extension=/path/to/extension/mysqli.so
;
; Note : The syntax used in previous PHP versions ('extension=.so' and
; 'extension='php_.dll') is supported for legacy reasons and may be
; deprecated in a future PHP major version. So, when it is possible, please
; move to the new ('extension=) syntax.
;
; Notes for Windows environments :
;
; - Many DLL files are located in the ext/
; extension folders as well as the separate PECL DLL download.
; Be sure to appropriately set the extension_dir directive.
;
;extension=bz2

; The ldap extension must be before curl if OpenSSL 1.0.2 and OpenLDAP is used
; otherwise it results in segfault when unloading after using SASL.
; See #8620 for more info.
;extension=ldap

;extension=curl
;extension=ffi
;extension=ftp
;extension=fileinfo
;extension=gd
;extension=gettext
;extension=gmp
;extension=intl
;extension=imap
;extension=mbstring
;extension=exif ; Must be after mbstring as it depends on it
;extension=mysqli
;extension=oci8_12c ; Use with Oracle Database 12c Instant Client
;extension=oci8_19 ; Use with Oracle Database 19 Instant Client
;extension=odbc
;extension=openssl
;extension=pdo_firebird
;extension=pdo_mysql
;extension=pdo_oci
;extension=pdo_odbc
;extension=pdo_pgsql
;extension=pdo_sqlite
;extension=pgsql
;extension=shmop
; extension=apcu.so

; The MIBS data available in the PHP distribution must be installed.
; See https://www.php.net/manual/en/snmp.installation.php
;extension=snmp

;extension=soap
;extension=sockets
;extension=sodium
;extension=sqlite3
;extension=tidy
;extension=xsl
;extension=zip

;zend_extension=opcache

;;;;;;;;;;;;;;;;;;;
; Module Settings ;
;;;;;;;;;;;;;;;;;;;

[CLI Server]
; Whether the CLI web server uses ANSI color coding in its terminal output.
cli_server.color = On

[Date]
; Defines the default timezone used by the date functions
; https://php.net/date.timezone
;date.timezone =

; https://php.net/date.default-latitude
;date.default_latitude = 31.7667

; https://php.net/date.default-longitude
;date.default_longitude = 35.2333

; https://php.net/date.sunrise-zenith
;date.sunrise_zenith = 90.833333

; https://php.net/date.sunset-zenith
;date.sunset_zenith = 90.833333

[filter]
; https://php.net/filter.default
;filter.default = unsafe_raw

; https://php.net/filter.default-flags
;filter.default_flags =

[iconv]
; Use of this INI entry is deprecated, use global input_encoding instead.
; If empty, default_charset or input_encoding or iconv.input_encoding is used.
; The precedence is: default_charset < input_encoding < iconv.input_encoding
;iconv.input_encoding =

; Use of this INI entry is deprecated, use global internal_encoding instead.
; If empty, default_charset or internal_encoding or iconv.internal_encoding is used.
; The precedence is: default_charset < internal_encoding < iconv.internal_encoding
;iconv.internal_encoding =

; Use of this INI entry is deprecated, use global output_encoding instead.
; If empty, default_charset or output_encoding or iconv.output_encoding is used.
; The precedence is: default_charset < output_encoding < iconv.output_encoding
; To use an output encoding conversion, iconv's output handler must be set
; otherwise output encoding conversion cannot be performed.
;iconv.output_encoding =

[imap]
; rsh/ssh logins are disabled by default. Use this INI entry if you want to
; enable them. Note that the IMAP library does not filter mailbox names before
; passing them to rsh/ssh command, thus passing untrusted data to this function
; with rsh/ssh enabled is insecure.
;imap.enable_insecure_rsh=0

[intl]
;intl.default_locale =
; This directive allows you to produce PHP errors when some error
; happens within intl functions. The value is the level of the error produced.
; Default is 0, which does not produce any errors.
;intl.error_level = E_WARNING
;intl.use_exceptions = 0

[sqlite3]
; Directory pointing to SQLite3 extensions
; https://php.net/sqlite3.extension-dir
;sqlite3.extension_dir =

; SQLite defensive mode flag (only available from SQLite 3.26+)
; When the defensive flag is enabled, language features that allow ordinary
; SQL to deliberately corrupt the database file are disabled. This forbids
; writing directly to the schema, shadow tables (eg. FTS data tables), or
; the sqlite_dbpage virtual table.
; https://www.sqlite.org/c3ref/c_dbconfig_defensive.html
; (for older SQLite versions, this flag has no use)
;sqlite3.defensive = 1

[Pcre]
; PCRE library backtracking limit.
; https://php.net/pcre.backtrack-limit
;pcre.backtrack_limit=100000

; PCRE library recursion limit.
; Please note that if you set this value to a high number you may consume all
; the available process stack and eventually crash PHP (due to reaching the
; stack size limit imposed by the Operating System).
; https://php.net/pcre.recursion-limit
;pcre.recursion_limit=100000

; Enables or disables JIT compilation of patterns. This requires the PCRE
; library to be compiled with JIT support.
;pcre.jit=1

[Pdo]
; Whether to pool ODBC connections. Can be one of "strict", "relaxed" or "off"
; https://php.net/pdo-odbc.connection-pooling
;pdo_odbc.connection_pooling=strict

[Pdo_mysql]
; Default socket name for local MySQL connects. If empty, uses the built-in
; MySQL defaults.
pdo_mysql.default_socket=

[Phar]
; https://php.net/phar.readonly
;phar.readonly = On

; https://php.net/phar.require-hash
;phar.require_hash = On

;phar.cache_list =

[mail function]
; For Win32 only.
; https://php.net/smtp
SMTP = localhost
; https://php.net/smtp-port
smtp_port = 25

; For Win32 only.
; https://php.net/sendmail-from
;sendmail_from = me@example.com

; For Unix only. You may supply arguments as well (default: "sendmail -t -i").
; https://php.net/sendmail-path
;sendmail_path =

; Force the addition of the specified parameters to be passed as extra parameters
; to the sendmail binary. These parameters will always replace the value of
; the 5th parameter to mail().
;mail.force_extra_parameters =

; Add X-PHP-Originating-Script: that will include uid of the script followed by the filename
mail.add_x_header = Off

; Use mixed LF and CRLF line separators to keep compatibility with some
; RFC 2822 non conformant MTA.
mail.mixed_lf_and_crlf = Off

; The path to a log file that will log all mail() calls. Log entries include
; the full path of the script, line number, To address and headers.
;mail.log =
; Log mail to syslog (Event Log on Windows).
;mail.log = syslog

[ODBC]
; https://php.net/odbc.default-db
;odbc.default_db = Not yet implemented

; https://php.net/odbc.default-user
;odbc.default_user = Not yet implemented

; https://php.net/odbc.default-pw
;odbc.default_pw = Not yet implemented

; Controls the ODBC cursor model.
; Default: SQL_CURSOR_STATIC (default).
;odbc.default_cursortype

; Allow or prevent persistent links.
; https://php.net/odbc.allow-persistent
odbc.allow_persistent = On

; Check that a connection is still valid before reuse.
; https://php.net/odbc.check-persistent
odbc.check_persistent = On

; Maximum number of persistent links. -1 means no limit.
; https://php.net/odbc.max-persistent
odbc.max_persistent = -1

; Maximum number of links (persistent + non-persistent). -1 means no limit.
; https://php.net/odbc.max-links
odbc.max_links = -1

; Handling of LONG fields. Returns number of bytes to variables. 0 means
; passthru.
; https://php.net/odbc.defaultlrl
odbc.defaultlrl = 4096

; Handling of binary data. 0 means passthru, 1 return as is, 2 convert to char.
; See the documentation on odbc_binmode and odbc_longreadlen for an explanation
; of odbc.defaultlrl and odbc.defaultbinmode
; https://php.net/odbc.defaultbinmode
odbc.defaultbinmode = 1

[MySQLi]

; Maximum number of persistent links. -1 means no limit.
; https://php.net/mysqli.max-persistent
mysqli.max_persistent = -1

; Allow accessing, from PHP's perspective, local files with LOAD DATA statements
; https://php.net/mysqli.allow_local_infile
;mysqli.allow_local_infile = On

; It allows the user to specify a folder where files that can be sent via LOAD DATA
; LOCAL can exist. It is ignored if mysqli.allow_local_infile is enabled.
;mysqli.local_infile_directory =

; Allow or prevent persistent links.
; https://php.net/mysqli.allow-persistent
mysqli.allow_persistent = On

; Maximum number of links. -1 means no limit.
; https://php.net/mysqli.max-links
mysqli.max_links = -1

; Default port number for mysqli_connect(). If unset, mysqli_connect() will use
; the $MYSQL_TCP_PORT or the mysql-tcp entry in /etc/services or the
; compile-time value defined MYSQL_PORT (in that order). Win32 will only look
; at MYSQL_PORT.
; https://php.net/mysqli.default-port
mysqli.default_port = 3306

; Default socket name for local MySQL connects. If empty, uses the built-in
; MySQL defaults.
; https://php.net/mysqli.default-socket
mysqli.default_socket =

; Default host for mysqli_connect() (doesn't apply in safe mode).
; https://php.net/mysqli.default-host
mysqli.default_host =

; Default user for mysqli_connect() (doesn't apply in safe mode).
; https://php.net/mysqli.default-user
mysqli.default_user =

; Default password for mysqli_connect() (doesn't apply in safe mode).
; Note that this is generally a bad idea to store passwords in this file.
; Any user with PHP access can run 'echo get_cfg_var("mysqli.default_pw")
; and reveal this password! And of course, any users with read access to this
; file will be able to reveal the password as well.
; https://php.net/mysqli.default-pw
mysqli.default_pw =

; If this option is enabled, closing a persistent connection will rollback
; any pending transactions of this connection, before it is put back
; into the persistent connection pool.
;mysqli.rollback_on_cached_plink = Off

[mysqlnd]
; Enable / Disable collection of general statistics by mysqlnd which can be
; used to tune and monitor MySQL operations.
mysqlnd.collect_statistics = On

; Enable / Disable collection of memory usage statistics by mysqlnd which can be
; used to tune and monitor MySQL operations.
mysqlnd.collect_memory_statistics = Off

; Records communication from all extensions using mysqlnd to the specified log
; file.
; https://php.net/mysqlnd.debug
;mysqlnd.debug =

; Defines which queries will be logged.
;mysqlnd.log_mask = 0

; Default size of the mysqlnd memory pool, which is used by result sets.
;mysqlnd.mempool_default_size = 16000

; Size of a pre-allocated buffer used when sending commands to MySQL in bytes.
;mysqlnd.net_cmd_buffer_size = 2048

; Size of a pre-allocated buffer used for reading data sent by the server in
; bytes.
;mysqlnd.net_read_buffer_size = 32768

; Timeout for network requests in seconds.
;mysqlnd.net_read_timeout = 31536000

; SHA-256 Authentication Plugin related. File with the MySQL server public RSA
; key.
;mysqlnd.sha256_server_public_key =

[OCI8]

; Connection: Enables privileged connections using external
; credentials (OCI_SYSOPER, OCI_SYSDBA)
; https://php.net/oci8.privileged-connect
;oci8.privileged_connect = Off

; Connection: The maximum number of persistent OCI8 connections per
; process. Using -1 means no limit.
; https://php.net/oci8.max-persistent
;oci8.max_persistent = -1

; Connection: The maximum number of seconds a process is allowed to
; maintain an idle persistent connection. Using -1 means idle
; persistent connections will be maintained forever.
; https://php.net/oci8.persistent-timeout
;oci8.persistent_timeout = -1

; Connection: The number of seconds that must pass before issuing a
; ping during oci_pconnect() to check the connection validity. When
; set to 0, each oci_pconnect() will cause a ping. Using -1 disables
; pings completely.
; https://php.net/oci8.ping-interval
;oci8.ping_interval = 60

; Connection: Set this to a user chosen connection class to be used
; for all pooled server requests with Oracle Database Resident
; Connection Pooling (DRCP). To use DRCP, this value should be set to
; the same string for all web servers running the same application,
; the database pool must be configured, and the connection string must
; specify to use a pooled server.
;oci8.connection_class =

; High Availability: Using On lets PHP receive Fast Application
; Notification (FAN) events generated when a database node fails. The
; database must also be configured to post FAN events.
;oci8.events = Off

; Tuning: This option enables statement caching, and specifies how
; many statements to cache. Using 0 disables statement caching.
; https://php.net/oci8.statement-cache-size
;oci8.statement_cache_size = 20

; Tuning: Enables row prefetching and sets the default number of
; rows that will be fetched automatically after statement execution.
; https://php.net/oci8.default-prefetch
;oci8.default_prefetch = 100

; Tuning: Sets the amount of LOB data that is internally returned from
; Oracle Database when an Oracle LOB locator is initially retrieved as
; part of a query. Setting this can improve performance by reducing
; round-trips.
; https://php.net/oci8.prefetch-lob-size
; oci8.prefetch_lob_size = 0

; Compatibility. Using On means oci_close() will not close
; oci_connect() and oci_new_connect() connections.
; https://php.net/oci8.old-oci-close-semantics
;oci8.old_oci_close_semantics = Off

[PostgreSQL]
; Allow or prevent persistent links.
; https://php.net/pgsql.allow-persistent
pgsql.allow_persistent = On

; Detect broken persistent links always with pg_pconnect().
; Auto reset feature requires a little overheads.
; https://php.net/pgsql.auto-reset-persistent
pgsql.auto_reset_persistent = Off

; Maximum number of persistent links. -1 means no limit.
; https://php.net/pgsql.max-persistent
pgsql.max_persistent = -1

; Maximum number of links (persistent+non persistent). -1 means no limit.
; https://php.net/pgsql.max-links
pgsql.max_links = -1

; Ignore PostgreSQL backends Notice message or not.
; Notice message logging require a little overheads.
; https://php.net/pgsql.ignore-notice
pgsql.ignore_notice = 0

; Log PostgreSQL backends Notice message or not.
; Unless pgsql.ignore_notice=0, module cannot log notice message.
; https://php.net/pgsql.log-notice
pgsql.log_notice = 0

[bcmath]
; Number of decimal digits for all bcmath functions.
; https://php.net/bcmath.scale
bcmath.scale = 0

[browscap]
; https://php.net/browscap
;browscap = extra/browscap.ini

[Session]
; Handler used to store/retrieve data.
; https://php.net/session.save-handler
session.save_handler = files

; Argument passed to save_handler. In the case of files, this is the path
; where data files are stored. Note: Windows users have to change this
; variable in order to use PHP's session functions.
;
; The path can be defined as:
;
; session.save_path = "N;/path"
;
; where N is an integer. Instead of storing all the session files in
; /path, what this will do is use subdirectories N-levels deep, and
; store the session data in those directories. This is useful if
; your OS has problems with many files in one directory, and is
; a more efficient layout for servers that handle many sessions.
;
; NOTE 1: PHP will not create this directory structure automatically.
; You can use the script in the ext/session dir for that purpose.
; NOTE 2: See the section on garbage collection below if you choose to
; use subdirectories for session storage
;
; The file storage module creates files using mode 600 by default.
; You can change that by using
;
; session.save_path = "N;MODE;/path"
;
; where MODE is the octal representation of the mode. Note that this
; does not overwrite the process's umask.
; https://php.net/session.save-path
session.save_path = "/var/lib/php/sessions"

; Whether to use strict session mode.
; Strict session mode does not accept an uninitialized session ID, and
; regenerates the session ID if the browser sends an uninitialized session ID.
; Strict mode protects applications from session fixation via a session adoption
; vulnerability. It is disabled by default for maximum compatibility, but
; enabling it is encouraged.
; https://wiki.php.net/rfc/strict_sessions
session.use_strict_mode = 0

; Whether to use cookies.
; https://php.net/session.use-cookies
session.use_cookies = 1

; https://php.net/session.cookie-secure
;session.cookie_secure =

; This option forces PHP to fetch and use a cookie for storing and maintaining
; the session id. We encourage this operation as it's very helpful in combating
; session hijacking when not specifying and managing your own session id. It is
; not the be-all and end-all of session hijacking defense, but it's a good start.
; https://php.net/session.use-only-cookies
session.use_only_cookies = 1

; Name of the session (used as cookie name).
; https://php.net/session.name
session.name = PHPSESSID

; Initialize session on request startup.
; https://php.net/session.auto-start
session.auto_start = 0

; Lifetime in seconds of cookie or, if 0, until browser is restarted.
; https://php.net/session.cookie-lifetime
session.cookie_lifetime = 0

; The path for which the cookie is valid.
; https://php.net/session.cookie-path
session.cookie_path = /

; The domain for which the cookie is valid.
; https://php.net/session.cookie-domain
session.cookie_domain =

; Whether or not to add the httpOnly flag to the cookie, which makes it
; inaccessible to browser scripting languages such as JavaScript.
; https://php.net/session.cookie-httponly
session.cookie_httponly =

; Add SameSite attribute to cookie to help mitigate Cross-Site Request Forgery (CSRF/XSRF)
; Current valid values are "Strict", "Lax" or "None". When using "None",
; make sure to include the quotes, as none is interpreted like false in ini files.
; https://tools.ietf.org/html/draft-west-first-party-cookies-07
session.cookie_samesite =

; Handler used to serialize data. php is the standard serializer of PHP.
; https://php.net/session.serialize-handler
session.serialize_handler = php

; Defines the probability that the 'garbage collection' process is started on every
; session initialization. The probability is calculated by using gc_probability/gc_divisor,
; e.g. 1/100 means there is a 1% chance that the GC process starts on each request.
; Default Value: 1
; Development Value: 1
; Production Value: 1
; https://php.net/session.gc-probability
session.gc_probability = 0

; Defines the probability that the 'garbage collection' process is started on every
; session initialization. The probability is calculated by using gc_probability/gc_divisor,
; e.g. 1/100 means there is a 1% chance that the GC process starts on each request.
; For high volume production servers, using a value of 1000 is a more efficient approach.
; Default Value: 100
; Development Value: 1000
; Production Value: 1000
; https://php.net/session.gc-divisor
session.gc_divisor = 1000

; After this number of seconds, stored data will be seen as 'garbage' and
; cleaned up by the garbage collection process.
; https://php.net/session.gc-maxlifetime
session.gc_maxlifetime = 1440

; NOTE: If you are using the subdirectory option for storing session files
; (see session.save_path above), then garbage collection does not
; happen automatically. You will need to do your own garbage
; collection through a shell script, cron entry, or some other method.
; For example, the following script is the equivalent of setting
; session.gc_maxlifetime to 1440 (1440 seconds = 24 minutes):
; find /path/to/sessions -cmin +24 -type f | xargs rm

; Check HTTP Referer to invalidate externally stored URLs containing ids.
; HTTP_REFERER has to contain this substring for the session to be
; considered as valid.
; https://php.net/session.referer-check
session.referer_check =

; Set to {nocache,private,public,} to determine HTTP caching aspects
; or leave this empty to avoid sending anti-caching headers.
; https://php.net/session.cache-limiter
session.cache_limiter = nocache

; Document expires after n minutes.
; https://php.net/session.cache-expire
session.cache_expire = 180

; trans sid support is disabled by default.
; Use of trans sid may risk your users' security.
; Use this option with caution.
; - User may send URL contains active session ID
; to other person via. email/irc/etc.
; - URL that contains active session ID may be stored
; in publicly accessible computer.
; - User may access your site with the same session ID
; always using URL stored in browser's history or bookmarks.
; https://php.net/session.use-trans-sid
session.use_trans_sid = 0

; Set session ID character length. This value could be between 22 to 256.
; Shorter length than default is supported only for compatibility reason.
; Users should use 32 or more chars.
; https://php.net/session.sid-length
; Default Value: 32
; Development Value: 26
; Production Value: 26
session.sid_length = 26

; The URL rewriter will look for URLs in a defined set of HTML tags.
;

is special; if you include them here, the rewriter will
; add a hidden field with the info which is otherwise appended
; to URLs. tag's action attribute URL will not be modified
; unless it is specified.
; Note that all valid entries require a "=", even if no value follows.
; Default Value: "a=href,area=href,frame=src,form="
; Development Value: "a=href,area=href,frame=src,form="
; Production Value: "a=href,area=href,frame=src,form="
; https://php.net/url-rewriter.tags
session.trans_sid_tags = "a=href,area=href,frame=src,form="

; URL rewriter does not rewrite absolute URLs by default.
; To enable rewrites for absolute paths, target hosts must be specified
; at RUNTIME. i.e. use ini_set()
; tags is special. PHP will check action attribute's URL regardless
; of session.trans_sid_tags setting.
; If no host is defined, HTTP_HOST will be used for allowed host.
; Example value: php.net,www.php.net,wiki.php.net
; Use "," for multiple hosts. No spaces are allowed.
; Default Value: ""
; Development Value: ""
; Production Value: ""
;session.trans_sid_hosts=""

; Define how many bits are stored in each character when converting
; the binary hash data to something readable.
; Possible values:
; 4 (4 bits: 0-9, a-f)
; 5 (5 bits: 0-9, a-v)
; 6 (6 bits: 0-9, a-z, A-Z, "-", ",")
; Default Value: 4
; Development Value: 5
; Production Value: 5
; https://php.net/session.hash-bits-per-character
session.sid_bits_per_character = 5

; Enable upload progress tracking in $_SESSION
; Default Value: On
; Development Value: On
; Production Value: On
; https://php.net/session.upload-progress.enabled
;session.upload_progress.enabled = On

; Cleanup the progress information as soon as all POST data has been read
; (i.e. upload completed).
; Default Value: On
; Development Value: On
; Production Value: On
; https://php.net/session.upload-progress.cleanup
;session.upload_progress.cleanup = On

; A prefix used for the upload progress key in $SESSION
; Default Value: "upload_progress"
; Development Value: "upload_progress_"
; Production Value: "upload_progress_"
; https://php.net/session.upload-progress.prefix
;session.upload_progress.prefix = "upload_progress_"

; The index name (concatenated with the prefix) in $_SESSION
; containing the upload progress information
; Default Value: "PHP_SESSION_UPLOAD_PROGRESS"
; Development Value: "PHP_SESSION_UPLOAD_PROGRESS"
; Production Value: "PHP_SESSION_UPLOAD_PROGRESS"
; https://php.net/session.upload-progress.name
;session.upload_progress.name = "PHP_SESSION_UPLOAD_PROGRESS"

; How frequently the upload progress should be updated.
; Given either in percentages (per-file), or in bytes
; Default Value: "1%"
; Development Value: "1%"
; Production Value: "1%"
; https://php.net/session.upload-progress.freq
;session.upload_progress.freq = "1%"

; The minimum delay between updates, in seconds
; Default Value: 1
; Development Value: 1
; Production Value: 1
; https://php.net/session.upload-progress.min-freq
;session.upload_progress.min_freq = "1"

; Only write session data when session data is changed. Enabled by default.
; https://php.net/session.lazy-write
;session.lazy_write = On

[Assertion]
; Switch whether to compile assertions at all (to have no overhead at run-time)
; -1: Do not compile at all
; 0: Jump over assertion at run-time
; 1: Execute assertions
; Changing from or to a negative value is only possible in php.ini!
; (For turning assertions on and off at run-time, toggle zend.assertions between the values 1 and 0)
; Default Value: 1
; Development Value: 1
; Production Value: -1
; https://php.net/zend.assertions
zend.assertions = -1

[COM]
; path to a file containing GUIDs, IIDs or filenames of files with TypeLibs
; https://php.net/com.typelib-file
;com.typelib_file =

; allow Distributed-COM calls
; https://php.net/com.allow-dcom
;com.allow_dcom = true

; autoregister constants of a component's typelib on com_load()
; https://php.net/com.autoregister-typelib
;com.autoregister_typelib = true

; register constants casesensitive
; https://php.net/com.autoregister-casesensitive
;com.autoregister_casesensitive = false

; show warnings on duplicate constant registrations
; https://php.net/com.autoregister-verbose
;com.autoregister_verbose = true

; The default character set code-page to use when passing strings to and from COM objects.
; Default: system ANSI code page
;com.code_page=

; The version of the .NET framework to use. The value of the setting are the first three parts
; of the framework's version number, separated by dots, and prefixed with "v", e.g. "v4.0.30319".
;com.dotnet_version=

[mbstring]
; language for internal character representation.
; This affects mb_send_mail() and mbstring.detect_order.
; https://php.net/mbstring.language
;mbstring.language = Japanese

; Use of this INI entry is deprecated, use global internal_encoding instead.
; internal/script encoding.
; Some encoding cannot work as internal encoding. (e.g. SJIS, BIG5, ISO-2022-*)
; If empty, default_charset or internal_encoding or iconv.internal_encoding is used.
; The precedence is: default_charset < internal_encoding < iconv.internal_encoding
;mbstring.internal_encoding =

; Use of this INI entry is deprecated, use global input_encoding instead.
; http input encoding.
; mbstring.encoding_translation = On is needed to use this setting.
; If empty, default_charset or input_encoding or mbstring.input is used.
; The precedence is: default_charset < input_encoding < mbstring.http_input
; https://php.net/mbstring.http-input
;mbstring.http_input =

; Use of this INI entry is deprecated, use global output_encoding instead.
; http output encoding.
; mb_output_handler must be registered as output buffer to function.
; If empty, default_charset or output_encoding or mbstring.http_output is used.
; The precedence is: default_charset < output_encoding < mbstring.http_output
; To use an output encoding conversion, mbstring's output handler must be set
; otherwise output encoding conversion cannot be performed.
; https://php.net/mbstring.http-output
;mbstring.http_output =

; enable automatic encoding translation according to
; mbstring.internal_encoding setting. Input chars are
; converted to internal encoding by setting this to On.
; Note: Do not use automatic encoding translation for
; portable libs/applications.
; https://php.net/mbstring.encoding-translation
;mbstring.encoding_translation = Off

; automatic encoding detection order.
; "auto" detect order is changed according to mbstring.language
; https://php.net/mbstring.detect-order
;mbstring.detect_order = auto

; substitute_character used when character cannot be converted
; one from another
; https://php.net/mbstring.substitute-character
;mbstring.substitute_character = none

; Enable strict encoding detection.
;mbstring.strict_detection = Off

; This directive specifies the regex pattern of content types for which mb_output_handler()
; is activated.
; Default: mbstring.http_output_conv_mimetypes=^(text/|application/xhtml+xml)
;mbstring.http_output_conv_mimetypes=

; This directive specifies maximum stack depth for mbstring regular expressions. It is similar
; to the pcre.recursion_limit for PCRE.
;mbstring.regex_stack_limit=100000

; This directive specifies maximum retry count for mbstring regular expressions. It is similar
; to the pcre.backtrack_limit for PCRE.
;mbstring.regex_retry_limit=1000000

[gd]
; Tell the jpeg decode to ignore warnings and try to create
; a gd image. The warning will then be displayed as notices
; disabled by default
; https://php.net/gd.jpeg-ignore-warning
;gd.jpeg_ignore_warning = 1

[exif]
; Exif UNICODE user comments are handled as UCS-2BE/UCS-2LE and JIS as JIS.
; With mbstring support this will automatically be converted into the encoding
; given by corresponding encode setting. When empty mbstring.internal_encoding
; is used. For the decode settings you can distinguish between motorola and
; intel byte order. A decode setting cannot be empty.
; https://php.net/exif.encode-unicode
;exif.encode_unicode = ISO-8859-15

; https://php.net/exif.decode-unicode-motorola
;exif.decode_unicode_motorola = UCS-2BE

; https://php.net/exif.decode-unicode-intel
;exif.decode_unicode_intel = UCS-2LE

; https://php.net/exif.encode-jis
;exif.encode_jis =

; https://php.net/exif.decode-jis-motorola
;exif.decode_jis_motorola = JIS

; https://php.net/exif.decode-jis-intel
;exif.decode_jis_intel = JIS

[Tidy]
; The path to a default tidy configuration file to use when using tidy
; https://php.net/tidy.default-config
;tidy.default_config = /usr/local/lib/php/default.tcfg

; Should tidy clean and repair output automatically?
; WARNING: Do not use this option if you are generating non-html content
; such as dynamic images
; https://php.net/tidy.clean-output
tidy.clean_output = Off

[soap]
; Enables or disables WSDL caching feature.
; https://php.net/soap.wsdl-cache-enabled
soap.wsdl_cache_enabled=1

; Sets the directory name where SOAP extension will put cache files.
; https://php.net/soap.wsdl-cache-dir
soap.wsdl_cache_dir="/tmp"

; (time to live) Sets the number of second while cached file will be used
; instead of original one.
; https://php.net/soap.wsdl-cache-ttl
soap.wsdl_cache_ttl=86400

; Sets the size of the cache limit. (Max. number of WSDL files to cache)
soap.wsdl_cache_limit = 5

[sysvshm]
; A default size of the shared memory segment
;sysvshm.init_mem = 10000

[ldap]
; Sets the maximum number of open links or -1 for unlimited.
ldap.max_links = -1

[dba]
;dba.default_handler=

[opcache]
; Determines if Zend OPCache is enabled
;opcache.enable=1

; Determines if Zend OPCache is enabled for the CLI version of PHP
;opcache.enable_cli=0

; The OPcache shared memory storage size.
;opcache.memory_consumption=128

; The amount of memory for interned strings in Mbytes.
;opcache.interned_strings_buffer=8

; The maximum number of keys (scripts) in the OPcache hash table.
; Only numbers between 200 and 1000000 are allowed.
;opcache.max_accelerated_files=10000

; The maximum percentage of "wasted" memory until a restart is scheduled.
;opcache.max_wasted_percentage=5

; When this directive is enabled, the OPcache appends the current working
; directory to the script key, thus eliminating possible collisions between
; files with the same name (basename). Disabling the directive improves
; performance, but may break existing applications.
;opcache.use_cwd=1

; When disabled, you must reset the OPcache manually or restart the
; webserver for changes to the filesystem to take effect.
;opcache.validate_timestamps=1

; How often (in seconds) to check file timestamps for changes to the shared
; memory storage allocation. ("1" means validate once per second, but only
; once per request. "0" means always validate)
;opcache.revalidate_freq=2

; Enables or disables file search in include_path optimization
;opcache.revalidate_path=0

; If disabled, all PHPDoc comments are dropped from the code to reduce the
; size of the optimized code.
;opcache.save_comments=1

; If enabled, compilation warnings (including notices and deprecations) will
; be recorded and replayed each time a file is included. Otherwise, compilation
; warnings will only be emitted when the file is first cached.
;opcache.record_warnings=0

; Allow file existence override (file_exists, etc.) performance feature.
;opcache.enable_file_override=0

; A bitmask, where each bit enables or disables the appropriate OPcache
; passes
;opcache.optimization_level=0x7FFFBFFF

;opcache.dups_fix=0

; The location of the OPcache blacklist file (wildcards allowed).
; Each OPcache blacklist file is a text file that holds the names of files
; that should not be accelerated. The file format is to add each filename
; to a new line. The filename may be a full path or just a file prefix
; (i.e., /var/www/x blacklists all the files and directories in /var/www
; that start with 'x'). Line starting with a ; are ignored (comments).
;opcache.blacklist_filename=

; Allows exclusion of large files from being cached. By default all files
; are cached.
;opcache.max_file_size=0

; How long to wait (in seconds) for a scheduled restart to begin if the cache
; is not being accessed.
;opcache.force_restart_timeout=180

; OPcache error_log file name. Empty string assumes "stderr".
;opcache.error_log=

; All OPcache errors go to the Web server log.
; By default, only fatal errors (level 0) or errors (level 1) are logged.
; You can also enable warnings (level 2), info messages (level 3) or
; debug messages (level 4).
;opcache.log_verbosity_level=1

; Preferred Shared Memory back-end. Leave empty and let the system decide.
;opcache.preferred_memory_model=

; Protect the shared memory from unexpected writing during script execution.
; Useful for internal debugging only.
;opcache.protect_memory=0

; Allows calling OPcache API functions only from PHP scripts which path is
; started from specified string. The default "" means no restriction
;opcache.restrict_api=

; Mapping base of shared memory segments (for Windows only). All the PHP
; processes have to map shared memory into the same address space. This
; directive allows to manually fix the "Unable to reattach to base address"
; errors.
;opcache.mmap_base=

; Facilitates multiple OPcache instances per user (for Windows only). All PHP
; processes with the same cache ID and user share an OPcache instance.
;opcache.cache_id=

; Enables and sets the second level cache directory.
; It should improve performance when SHM memory is full, at server restart or
; SHM reset. The default "" disables file based caching.
;opcache.file_cache=

; Enables or disables opcode caching in shared memory.
;opcache.file_cache_only=0

; Enables or disables checksum validation when script loaded from file cache.
;opcache.file_cache_consistency_checks=1

; Implies opcache.file_cache_only=1 for a certain process that failed to
; reattach to the shared memory (for Windows only). Explicitly enabled file
; cache is required.
;opcache.file_cache_fallback=1

; Enables or disables copying of PHP code (text segment) into HUGE PAGES.
; Under certain circumstances (if only a single global PHP process is
; started from which all others fork), this can increase performance
; by a tiny amount because TLB misses are reduced. On the other hand, this
; delays PHP startup, increases memory usage and degrades performance
; under memory pressure - use with care.
; Requires appropriate OS configuration.
;opcache.huge_code_pages=0

; Validate cached file permissions.
;opcache.validate_permission=0

; Prevent name collisions in chroot'ed environment.
;opcache.validate_root=0

; If specified, it produces opcode dumps for debugging different stages of
; optimizations.
;opcache.opt_debug_level=0

; Specifies a PHP script that is going to be compiled and executed at server
; start-up.
; https://php.net/opcache.preload
;opcache.preload=

; Preloading code as root is not allowed for security reasons. This directive
; facilitates to let the preloading to be run as another user.
; https://php.net/opcache.preload_user
;opcache.preload_user=

; Prevents caching files that are less than this number of seconds old. It
; protects from caching of incompletely updated files. In case all file updates
; on your site are atomic, you may increase performance by setting it to "0".
;opcache.file_update_protection=2

; Absolute path used to store shared lockfiles (for *nix only).
;opcache.lockfile_path=/tmp

[curl]
; A default value for the CURLOPT_CAINFO option. This is required to be an
; absolute path.
;curl.cainfo =

[openssl]
; The location of a Certificate Authority (CA) file on the local filesystem
; to use when verifying the identity of SSL/TLS peers. Most users should
; not specify a value for this directive as PHP will attempt to use the
; OS-managed cert stores in its absence. If specified, this value may still
; be overridden on a per-stream basis via the "cafile" SSL stream context
; option.
;openssl.cafile=

; If openssl.cafile is not specified or if the CA file is not found, the
; directory pointed to by openssl.capath is searched for a suitable
; certificate. This value must be a correctly hashed certificate directory.
; Most users should not specify a value for this directive as PHP will
; attempt to use the OS-managed cert stores in its absence. If specified,
; this value may still be overridden on a per-stream basis via the "capath"
; SSL stream context option.
;openssl.capath=

[ffi]
; FFI API restriction. Possible values:
; "preload" - enabled in CLI scripts and preloaded files (default)
; "false" - always disabled
; "true" - always enabled
;ffi.enable=preload

; List of headers files to preload, wildcard patterns allowed.
;ffi.preload=

[alex0107]

• Does it consistently crash if you set the debugging option opcache.protect_memory=1 in your php.ini?

Yes...

[nielsdos]

Thanks for the info!

The fact it reliably reproduces with protect_memory is an indication that the opcache shm gets corrupted.
Can you please either use valgrind or gdb to get a backtrace? To do so, you can start php-fpm in foreground mode like so:
For Valgrind: valgrind php-fpm -F
or if you want to use gdb: gdb --args php-fpm -F and for gdb enter set follow-fork-mode child and then enter continue. When gdb captures the crash you can use bt full to get the full backtrace.
You may need to install the debug symbols package for php on your distro to get a meaningful backtrace.

Alternatively, we can also debug it for you but would need access to the source code in that case.

[alex0107]

I hope this helps?

(gdb) bt full                                                                                                             
#0  0x00007fc9d432960f in __libc_accept (fd=14, addr=..., len=0x7ffc84e1e5f8) at ../sysdeps/unix/sysv/linux/accept.c:26   
        sc_ret = -512                                                                                                     
        sc_cancel_oldtype = 0                                                                                             
        sc_ret = <optimized out>                                                                                          
#1  0x0000559f2efbe13f in ?? ()                                                                                           
No symbol table info available.                                                                                           
#2  0x0000559f2ec5f709 in ?? ()                                                                                           
No symbol table info available.                                                                                           
Backtrace stopped: Cannot access memory at address 0x7ffc84e1ec18                                                         
(gdb) 

[nielsdos]

Looks like only the main thread got backtraced. Try thread apply all bt full instead of bt full.
I also see that the debug symbols may not be available, depending on your distro it can be auto-downloaded. E.g. for Debian it's probably sufficient to set export DEBUGINFOD_URLS="https://debuginfod.debian.net" in your terminal.

[alex0107]

Can I also do it with gdb --pid <Master-Process>?