johnjamesjacoby 43644069ea Permalinks: Sanitize non-visible characters inside sanitize_title_with_dashes(). ...

This change prevents non-visible characters in titles from creating encoded values in permalinks, opting instead for the following replacement strategy:

* Non-visible non-zero-width characters are replaced with hyphens
* Non-visible zero-width characters are removed entirely

Included with this change are 64 additional PHPUnit assertions to confirm that only the targeted non-visible characters are sanitized as intended.

Before this change, URLs would unintentionally contain encoded values where these non-visible characters were. After this change, URLs intentionally strip out or hyphenate these non-visible characters.

Props costdev, dhanendran, hellofromtonya, paaljoachim, peterwilsoncc, poena, sergeybiryukov.

Fixes #47912.
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git-svn-id: http://core.svn.wordpress.org/trunk@51573 1a063a9b-81f0-0310-95a4-ce76da25c4cd

2021-11-02 18:47:57 +00:00

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