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Code Modernization: Fix null to non-nullable deprecation in `term_exists()`. 

The `term_exists()` function expects a string or an integer for the `$term` parameter. It validates for integer, but not for string or `null`.

One of the pre-existing test cases, passed `null` to the function, leading to a `trim(): Passing null to parameter #1 ($string) of type string is deprecated` notice on PHP 8.1.

Fixed now by doing a cursory check on the variable at the start of the function and bowing out early in case the `$term` is `null`.

The issue was discovered via and is already covered by the `Tests_TermExists::test_term_exists_unknown()` test method.

Follow-up to [15220]. [38716].

Props jrf, hellofromTonya.
See #53635.
Built from https://develop.svn.wordpress.org/trunk@51796


git-svn-id: http://core.svn.wordpress.org/trunk@51403 1a063a9b-81f0-0310-95a4-ce76da25c4cd
This commit is contained in:
hellofromTonya 2021-09-10 15:03:57 +00:00
parent 018ad6098c
commit 243e75eb41
2 changed files with 5 additions and 1 deletions
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4
wp-includes/taxonomy.php
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@ -1480,6 +1480,10 @@ function unregister_term_meta( $taxonomy, $meta_key ) {
function term_exists( $term, $taxonomy = '', $parent = null ) {
global $wpdb;
if ( null === $term ) {
return null;
}
$select = "SELECT term_id FROM $wpdb->terms as t WHERE ";
$tax_select = "SELECT tt.term_id, tt.term_taxonomy_id FROM $wpdb->terms AS t INNER JOIN $wpdb->term_taxonomy as tt ON tt.term_id = t.term_id WHERE ";

2
wp-includes/version.php
View File

@ -13,7 +13,7 @@
*
* @global string $wp_version
*/
$wp_version = '5.9-alpha-51795';
$wp_version = '5.9-alpha-51796';
/**
* Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.