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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 |
|---|---|
| 2079 | return $term_info; |
| 2080 | $term_ids[] = $term_info['term_id']; |
| 2081 | $tt_id = $term_info['term_taxonomy_id']; |
| 2082 | $tt_ids[] = $tt_id; |
| 2083 | |
| 2084 | if ( $wpdb->get_var( $wpdb->prepare( "SELECT term_taxonomy_id FROM $wpdb->term_relationships WHERE object_id = %d AND term_taxonomy_id = %d", $object_id, $tt_id ) ) ) |
| 2085 | continue; |
| 2086 | do_action( 'add_term_relationship', $object_id, $tt_id ); |
| 2087 | $wpdb->insert( $wpdb->term_relationships, array( 'object_id' => $object_id, 'term_taxonomy_id' => $tt_id ) ); |
| 2088 | do_action( 'added_term_relationship', $object_id, $tt_id ); |
| 2089 | } |
| 2090 | |
| 2091 | wp_update_term_count($tt_ids, $taxonomy); |
| 2092 | |
| 2093 | if ( ! $append ) { |
| 2094 | $delete_terms = array_diff($old_tt_ids, $tt_ids); |
| 2095 | if ( $delete_terms ) { |
| 2096 | $in_delete_terms = "'" . implode("', '", $delete_terms) . "'"; |
| 2097 | do_action( 'delete_term_relationships', $object_id, $delete_terms ); |