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The best way to understand what a hook does is to look at where it occurs in the source code.
do_action( "hook_name" )
apply_filters( "hook_name", "what_to_filter" )
.Remember, this hook may occur in more than one file. Moreover, the hook's context may change from version to version.
Line | Code |
---|---|
2783 | * Fires immediately before an object-term relationship is added. |
2784 | * |
2785 | * @since 2.9.0 |
2786 | * @since 4.7.0 Added the `$taxonomy` parameter. |
2787 | * |
2788 | * @param int $object_id Object ID. |
2789 | * @param int $tt_id Term taxonomy ID. |
2790 | * @param string $taxonomy Taxonomy slug. |
2791 | */ |
2792 | do_action( 'add_term_relationship', $object_id, $tt_id, $taxonomy ); |
2793 |
|
2794 | $wpdb->insert( |
2795 | $wpdb->term_relationships, |
2796 | array( |
2797 | 'object_id' => $object_id, |
2798 | 'term_taxonomy_id' => $tt_id, |
2799 | ) |
2800 | ); |
2801 |
|