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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 |
|---|---|
| 324 | |
| 325 | /** |
| 326 | * Filter the list of post types to delete with a user. |
| 327 | * |
| 328 | * @since 3.4.0 |
| 329 | * |
| 330 | * @param array $post_types_to_delete Post types to delete. |
| 331 | * @param int $id User ID. |
| 332 | */ |
| 333 | $post_types_to_delete = apply_filters( 'post_types_to_delete_with_user', $post_types_to_delete, $id ); |
| 334 | $post_types_to_delete = implode( "', '", $post_types_to_delete ); |
| 335 | $post_ids = $wpdb->get_col( $wpdb->prepare( "SELECT ID FROM $wpdb->posts WHERE post_author = %d AND post_type IN ('$post_types_to_delete')", $id ) ); |
| 336 | if ( $post_ids ) { |
| 337 | foreach ( $post_ids as $post_id ) |
| 338 | wp_delete_post( $post_id ); |
| 339 | } |
| 340 | |
| 341 | // Clean links |
| 342 | $link_ids = $wpdb->get_col( $wpdb->prepare("SELECT link_id FROM $wpdb->links WHERE link_owner = %d", $id) ); |