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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 |
---|---|
2260 | * Fires immediately after an object-term relationship is added. |
2261 | * |
2262 | * @since 2.9.0 |
2263 | * @since 4.7.0 Added the `$taxonomy` parameter. |
2264 | * |
2265 | * @param int $object_id Object ID. |
2266 | * @param int $tt_id Term taxonomy ID. |
2267 | * @param string $taxonomy Taxonomy slug. |
2268 | */ |
2269 | do_action( 'added_term_relationship', $object_id, $tt_id, $taxonomy ); |
2270 | $new_tt_ids[] = $tt_id; |
2271 | } |
2272 |
|
2273 | if ( $new_tt_ids ) |
2274 | wp_update_term_count( $new_tt_ids, $taxonomy ); |
2275 |
|
2276 | if ( ! $append ) { |
2277 | $delete_tt_ids = array_diff( $old_tt_ids, $tt_ids ); |
2278 |
|