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<title>[54317] trunk/src/wp-includes/rest-api/endpoints/class-wp-rest-users-controller.php: Code Modernization: Fix null to non-nullable deprecation in `WP_REST_Users_Controller::update_item()`.</title>
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<dt style="float: left; width: 6em; font-weight: bold">Revision</dt> <dd><a style="font-weight: bold" href="https://core.trac.wordpress.org/changeset/54317">54317</a><script type="application/ld+json">{"@context":"http://schema.org","@type":"EmailMessage","description":"Review this Commit","action":{"@type":"ViewAction","url":"https://core.trac.wordpress.org/changeset/54317","name":"Review Commit"}}</script></dd>
<dt style="float: left; width: 6em; font-weight: bold">Author</dt> <dd>hellofromTonya</dd>
<dt style="float: left; width: 6em; font-weight: bold">Date</dt> <dd>2022-09-26 21:44:40 +0000 (Mon, 26 Sep 2022)</dd>
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<pre style='padding-left: 1em; margin: 2em 0; border-left: 2px solid #ccc; line-height: 1.25; font-size: 105%; font-family: sans-serif'>Code Modernization: Fix null to non-nullable deprecation in `WP_REST_Users_Controller::update_item()`.
Not all requests are accompanied by a `$request['email']`. This leads to a PHP 8.1 "passing null to non-nullable" deprecation notice when the `WP_REST_Users_Controller::update_item()` method passes a `null` email address onto `email_exists()`, which eventually reached the `WP_User::get_data_by()` method where things go wrong.
In the next condition in the code of the `WP_REST_Users_Controller::update_item()` method - `if ( $owner_id && $owner_id !== $id )` - you can see that the code already takes this into account as it will not throw a `WP_Error` if `$owner_id` is falsey.
`WP_User::get_data_by()` returns `false` for a failed field request. The other functions through which the return value is passed through, do the same.
So, by setting a default value for `$owner_id` of `false` and only checking `email_exists()` when there is an email to check, the "passing null to non-nullable" deprecation notice is bypassed without breaking BC.
Fixes a whole slew of test errors along the lines of:
{{{
6) WP_Test_REST_Users_Controller::test_update_item_en_US_locale
trim(): Passing null to parameter https://github.com/WordPress/wordpress-develop/pull/1 ($string) of type string is deprecated
/var/www/src/wp-includes/class-wp-user.php:211
/var/www/src/wp-includes/pluggable.php:105
/var/www/src/wp-includes/user.php:1953
/var/www/src/wp-includes/rest-api/endpoints/class-wp-rest-users-controller.php:728
/var/www/src/wp-includes/rest-api/class-wp-rest-server.php:1143
/var/www/src/wp-includes/rest-api/class-wp-rest-server.php:990
/var/www/tests/phpunit/includes/spy-rest-server.php:67
/var/www/tests/phpunit/tests/rest-api/rest-users-controller.php:1719
/var/www/vendor/bin/phpunit:123
}}}
Follow-up to <a href="https://core.trac.wordpress.org/changeset/44641">[44641]</a>, <a href="https://core.trac.wordpress.org/changeset/38832">[38832]</a>.
Props jrf.
See <a href="https://core.trac.wordpress.org/ticket/55656">#55656</a>.</pre>
<h3>Modified Paths</h3>
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<li><a href="#trunksrcwpincludesrestapiendpointsclasswprestuserscontrollerphp">trunk/src/wp-includes/rest-api/endpoints/class-wp-rest-users-controller.php</a></li>
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<h3>Diff</h3>
<a id="trunksrcwpincludesrestapiendpointsclasswprestuserscontrollerphp"></a>
<div class="modfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Modified: trunk/src/wp-includes/rest-api/endpoints/class-wp-rest-users-controller.php</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- trunk/src/wp-includes/rest-api/endpoints/class-wp-rest-users-controller.php 2022-09-26 21:42:12 UTC (rev 54316)
+++ trunk/src/wp-includes/rest-api/endpoints/class-wp-rest-users-controller.php 2022-09-26 21:44:40 UTC (rev 54317)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -725,7 +725,10 @@
</span><span class="cx" style="display: block; padding: 0 10px"> );
</span><span class="cx" style="display: block; padding: 0 10px"> }
</span><span class="cx" style="display: block; padding: 0 10px">
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">- $owner_id = email_exists( $request['email'] );
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ $owner_id = false;
+ if ( is_string( $request['email'] ) ) {
+ $owner_id = email_exists( $request['email'] );
+ }
</ins><span class="cx" style="display: block; padding: 0 10px">
</span><span class="cx" style="display: block; padding: 0 10px"> if ( $owner_id && $owner_id !== $id ) {
</span><span class="cx" style="display: block; padding: 0 10px"> return new WP_Error(
</span></span></pre>
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