WordPress has historically often used code like `preg_split( '/[\s,]+/', $var )` to parse a string of comma-separated values into an array. However, this approach was causing an empty string to not be parsed into an empty array as expected, but rather into an array with the empty string as its sole element.
This was among other areas causing problems in the REST API where passing an empty request parameter could cause that request to fail because, instead of it being ignored, that parameter would be compared against the valid values for it, which typically do not include an empty string.
Props david.binda, sstoqnov.
Fixes#43977.
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Introduces in core new focus styles dedicated to Windows High Contrast mode. The
new styles use a transparent CSS outline as already explored in the Block Editor.
This first part covers some of the main user interface controls like buttons, links,
and media views elements. Other parts will be addressed in the next future.
Fixes#41286.
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Sometimes, Safari and VoiceOver read out the text hidden with `screen-reader-text`
in a wrong order. While there's no known, full, solution, it is possible to make
them respect the correct order reliably at least within buttons.
Fixes#42006.
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The `keyup` event was used to provide support for IE8, where which doesn't support the `input` event. As we dropped IE8 support some time ago, this was simply adding unnecessary complexity and double-event triggers.
Props dlh, afercia.
Fixes#32882.
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Defining `WP_TESTS_SKIP_INSTALL=1` when running tests will skip the install step. While this shouldn't be used for full test runs, it's useful for saving time when running small groups of tests.
Props soulseekah.
Fixes#43432.
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In [41746], `wp_get_media_creation_timestamp()` was introduced to read the created timestamp for videos from `getID3` in meta whenever possible. This information is useful separately from the dates on the file itself.
This adds the same support audio files by utilizing `wp_get_media_creation_timestamp()` in `wp_read_audio_metadata()`.
Props blob folio, desrosj.
Fixes#42017.
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This changeset introduces a `WP_Shutdown_Handler` class that detects fatal errors and which extension (plugin or theme) causes them. Such an error is then recorded, and an error message is displayed. Subsequently, in certain protected areas, for example the admin, the broken extension will be paused, ensuring that the website is still usable in the respective area. The major benefit is that this mechanism allows site owners to still log in to their website, to fix the problem by either disabling the extension or solving the bug and then resuming the extension.
Extensions are only paused in certain designated areas. The frontend for example stays unaffected, as it is impossible to know what pausing the extension would cause to be missing, so it might be preferrable to clearly see that the website is temporarily not accessible instead.
The fatal error recovery is especially important in scope of encouraging the switch to a maintained PHP version, as not necessarily every WordPress extension is compatible with all PHP versions. If problems occur now, non-technical site owners that do not have immediate access to the codebase are not locked out of their site and can at least temporarily solve the problem quickly.
Websites that have custom requirements in that regard can implement their own shutdown handler by adding a `shutdown-handler.php` drop-in that returns the handler instance to use, which must be based on a class that inherits `WP_Shutdown_Handler`. That handler will then be used in place of the default one.
Websites that would like to modify specifically the error template displayed in the frontend can add a `php-error.php` drop-in that works similarly to the existing `db-error.php` drop-in.
Props afragen, bradleyt, flixos90, ocean90, schlessera, SergeyBiryukov, spacedmonkey.
Fixes#44458.
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Instead of turning the return value of `stream_get_wrappers()` into a regex to match the scheme, we can instead extract the scheme and search the return value of `stream_get_wrappers()`.
Props schlessera, swissspidy.
Fixes#45553.
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Felix Arntz
Andrea Fercia
desrosj
Gary Pendergast
Boone Gorges
Pascal Birchler
Dominik Schilling
Peter Wilson