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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 |
|---|---|
| 429 | // Old-style action. |
| 430 | if ( 'post' == $meta_type ) { |
| 431 | /** |
| 432 | * Fires immediately after deleting metadata for a post. |
| 433 | * |
| 434 | * @since 2.9.0 |
| 435 | * |
| 436 | * @param array $meta_ids An array of deleted post metadata entry IDs. |
| 437 | */ |
| 438 | do_action( 'deleted_postmeta', $meta_ids ); |
| 439 | } |
| 440 | |
| 441 | return true; |
| 442 | } |
| 443 | |
| 444 | /** |
| 445 | * Retrieve metadata for the specified object. |
| 446 | * |
| 447 | * @since 2.9.0 |