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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 |
|---|---|
| 2174 | return $term_info; |
| 2175 | $term_ids[] = $term_info['term_id']; |
| 2176 | $tt_id = $term_info['term_taxonomy_id']; |
| 2177 | $tt_ids[] = $tt_id; |
| 2178 | |
| 2179 | 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 ) ) ) |
| 2180 | continue; |
| 2181 | do_action( 'add_term_relationship', $object_id, $tt_id ); |
| 2182 | $wpdb->insert( $wpdb->term_relationships, array( 'object_id' => $object_id, 'term_taxonomy_id' => $tt_id ) ); |
| 2183 | do_action( 'added_term_relationship', $object_id, $tt_id ); |
| 2184 | $new_tt_ids[] = $tt_id; |
| 2185 | } |
| 2186 | |
| 2187 | if ( $new_tt_ids ) |
| 2188 | wp_update_term_count( $new_tt_ids, $taxonomy ); |
| 2189 | |
| 2190 | if ( ! $append ) { |
| 2191 | $delete_terms = array_diff($old_tt_ids, $tt_ids); |
| 2192 | if ( $delete_terms ) { |