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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 |
|---|---|
| 3748 | /** |
| 3749 | * Fires before a post is sent to the Trash. |
| 3750 | * |
| 3751 | * @since 3.3.0 |
| 3752 | * @since 6.3.0 Added the `$previous_status` parameter. |
| 3753 | * |
| 3754 | * @param int $post_id Post ID. |
| 3755 | * @param string $previous_status The status of the post about to be trashed. |
| 3756 | */ |
| 3757 | do_action( 'wp_trash_post', $post_id, $previous_status ); |
| 3758 | |
| 3759 | add_post_meta( $post_id, '_wp_trash_meta_status', $previous_status ); |
| 3760 | add_post_meta( $post_id, '_wp_trash_meta_time', time() ); |
| 3761 | |
| 3762 | $post_updated = wp_update_post( |
| 3763 | array( |
| 3764 | 'ID' => $post_id, |
| 3765 | 'post_status' => 'trash', |
| 3766 | ) |