Use 'ENT_QUOTES|ENT_SUBSTITUTE' for HTML encoding and decoding functions #6583
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Sounds like @nikic would be the best person to review this, as he's already familiar with the feature and discussion. |
This reverts commit cf4fd53.
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I've reverted the change that introduced the HTML5 default when decoding. While I think that should be the case, it should be a separate discussion and PR (and I suspect it should not be done via the default flags, because these would be replaced if the programmer specified their own flags without a document type). |
nikic
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Jan 18, 2021
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Thanks @nikic |
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* Add php 8.1 to GitHub actions * Fix htmlspecialchars to have same encoding as PHP 8.1 php/php-src#6583 * Skip Laravel 7 tests for PHP 8.1
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Discussion on Internals: https://news-web.php.net/php.internals/112782
Changing the HTML encoding/decoding functions to
ENT_QUOTES|ENT_SUBSTITUTE, because the current default ofENT_COMPATis dangerous:This causes a XSS vulnerability because single quote characters are not encoded by default:
This is why all PHP frameworks I can find use
ENT_QUOTESat a minimum, and will often useENT_SUBSTITUTEto avoid the whole value being lost due to a single bad character.As to
ENT_HTML401, I think that still needs to be the default (rather thanENT_HTML5), as Microsoft Outlook still does not accept', and can be an issue with older versions of Android (both are fine with').Note: This is the first time I've edited any C code for a project (before now I've only edited things for myself), and while it seems to work, I'd appreciate mistakes can be made (feel free to delete). I'm also happy to attempt changes to the doc-en repo as well.