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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 |
|---|---|
| 3361 | |
| 3362 | /** |
| 3363 | * Filters whether a post trashing should take place. |
| 3364 | * |
| 3365 | * @since 4.9.0 |
| 3366 | * |
| 3367 | * @param bool|null $trash Whether to go forward with trashing. |
| 3368 | * @param WP_Post $post Post object. |
| 3369 | */ |
| 3370 | $check = apply_filters( 'pre_trash_post', null, $post ); |
| 3371 | |
| 3372 | if ( null !== $check ) { |
| 3373 | return $check; |
| 3374 | } |
| 3375 | |
| 3376 | /** |
| 3377 | * Fires before a post is sent to the Trash. |
| 3378 | * |
| 3379 | * @since 3.3.0 |