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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 |
|---|---|
| 3562 | |
| 3563 | /** |
| 3564 | * Filters whether a post trashing should take place. |
| 3565 | * |
| 3566 | * @since 4.9.0 |
| 3567 | * |
| 3568 | * @param bool|null $trash Whether to go forward with trashing. |
| 3569 | * @param WP_Post $post Post object. |
| 3570 | */ |
| 3571 | $check = apply_filters( 'pre_trash_post', null, $post ); |
| 3572 | |
| 3573 | if ( null !== $check ) { |
| 3574 | return $check; |
| 3575 | } |
| 3576 | |
| 3577 | /** |
| 3578 | * Fires before a post is sent to the Trash. |
| 3579 | * |
| 3580 | * @since 3.3.0 |