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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 |
|---|---|
| 4026 | * Filters whether a post trashing should take place. |
| 4027 | * |
| 4028 | * @since 4.9.0 |
| 4029 | * @since 6.3.0 Added the `$previous_status` parameter. |
| 4030 | * |
| 4031 | * @param bool|null $trash Whether to go forward with trashing. |
| 4032 | * @param WP_Post $post Post object. |
| 4033 | * @param string $previous_status The status of the post about to be trashed. |
| 4034 | */ |
| 4035 | $check = apply_filters( 'pre_trash_post', null, $post, $previous_status ); |
| 4036 | |
| 4037 | if ( null !== $check ) { |
| 4038 | return $check; |
| 4039 | } |
| 4040 | |
| 4041 | /** |
| 4042 | * Fires before a post is sent to the Trash. |
| 4043 | * |
| 4044 | * @since 3.3.0 |