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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 |
|---|---|
| 3902 | * Filters whether a post trashing should take place. |
| 3903 | * |
| 3904 | * @since 4.9.0 |
| 3905 | * @since 6.3.0 Added the `$previous_status` parameter. |
| 3906 | * |
| 3907 | * @param bool|null $trash Whether to go forward with trashing. |
| 3908 | * @param WP_Post $post Post object. |
| 3909 | * @param string $previous_status The status of the post about to be trashed. |
| 3910 | */ |
| 3911 | $check = apply_filters( 'pre_trash_post', null, $post, $previous_status ); |
| 3912 | |
| 3913 | if ( null !== $check ) { |
| 3914 | return $check; |
| 3915 | } |
| 3916 | |
| 3917 | /** |
| 3918 | * Fires before a post is sent to the Trash. |
| 3919 | * |
| 3920 | * @since 3.3.0 |