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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 |
|---|---|
| 465 | // Old-style action. |
| 466 | if ( 'post' === $meta_type ) { |
| 467 | /** |
| 468 | * Fires immediately after deleting metadata for a post. |
| 469 | * |
| 470 | * @since 2.9.0 |
| 471 | * |
| 472 | * @param string[] $meta_ids An array of metadata entry IDs to delete. |
| 473 | */ |
| 474 | do_action( 'deleted_postmeta', $meta_ids ); |
| 475 | } |
| 476 | |
| 477 | return true; |
| 478 | } |
| 479 | |
| 480 | /** |
| 481 | * Retrieves the value of a metadata field for the specified object type and ID. |
| 482 | * |
| 483 | * If the meta field exists, a single value is returned if `$single` is true, |