Fix lookup of lc namespace

Author: iluuu1994

ext/reflection/php_reflection.c

@@ -7210,18 +7210,33 @@ static zval *_reflection_write_property(zend_object *object, zend_string *name,
 
 ZEND_METHOD(ReflectionConstant, __construct)
 {
-	zend_string *const_name;
+	zend_string *name;
 
 	zval *object = ZEND_THIS;
 	reflection_object *intern = Z_REFLECTION_P(object);
 
 	ZEND_PARSE_PARAMETERS_START(1, 1)
-		Z_PARAM_STR(const_name)
+		Z_PARAM_STR(name)
 	ZEND_PARSE_PARAMETERS_END();
 
-	zval *const_zv = zend_get_constant(const_name);
+	/* Build name with lowercased ns. */
+	bool backslash_prefixed = ZSTR_VAL(name)[0] == '\\';
+	char *source = ZSTR_VAL(name) + backslash_prefixed;
+	size_t source_len = ZSTR_LEN(name) - backslash_prefixed;
+	zend_string *lc_name = zend_string_alloc(source_len, /* persistent */ false);
+	const char *ns_end = zend_memrchr(source, '\\', source_len);
+	size_t ns_len = 0;
+	if (ns_end) {
+		ns_len = ns_end - ZSTR_VAL(name);
+		zend_str_tolower_copy(ZSTR_VAL(lc_name), source, ns_len);
+	}
+	memcpy(ZSTR_VAL(lc_name) + ns_len, source + ns_len, source_len - ns_len);
+
+	zval *const_zv = zend_get_constant(lc_name);
+	zend_string_release_ex(lc_name, /* persistent */ false);
+
 	if (!const_zv) {
-		zend_throw_exception_ex(reflection_exception_ptr, 0, "Constant \"%s\" does not exist", ZSTR_VAL(const_name));
+		zend_throw_exception_ex(reflection_exception_ptr, 0, "Constant \"%s\" does not exist", ZSTR_VAL(name));
 		RETURN_THROWS();
 	}
 
@@ -7230,7 +7245,7 @@ ZEND_METHOD(ReflectionConstant, __construct)
 	intern->ptr = const_;
 	intern->ref_type = REF_TYPE_OTHER;
 
-	ZVAL_STR_COPY(reflection_prop_name(object), const_name);
+	ZVAL_STR_COPY(reflection_prop_name(object), name);
 }
 
 ZEND_METHOD(ReflectionConstant, getName)

ext/reflection/tests/ReflectionConstant_ns.phpt

@@ -0,0 +1,22 @@
+--TEST--
+ReflectionConstant with namespace
+--FILE--
+<?php
+
+namespace Foo;
+
+const C = 42;
+
+var_dump(new \ReflectionConstant('Foo\\C'));
+var_dump(new \ReflectionConstant('\\Foo\\C'));
+
+?>
+--EXPECT--
+object(ReflectionConstant)#1 (1) {
+  ["name"]=>
+  string(5) "Foo\C"
+}
+object(ReflectionConstant)#1 (1) {
+  ["name"]=>
+  string(6) "\Foo\C"
+}