Sergey Biryukov 5eede7436a KSES: Use the polyfilled PHP 8 string functions in _wp_kses_allow_pdf_objects():
* `str_contains()`
* `str_ends_with()`
* `str_starts_with()`

Additionally, include a test for a PDF file in an `<object>` tag with an unsupported protocol.

Follow-up to [51963], [52039], [52040], [52304], [52309].

Props TobiasBg, ramonopoly.
See #54261.

git-svn-id: https://develop.svn.wordpress.org/trunk@52326 602fd350-edb4-49c9-b593-d223f7449a82
2021-12-06 11:06:40 +00:00
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