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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 |
|---|---|
| 2886 | * The following re-formulates the logic from wp_trash_post() as done in |
| 2887 | * wp_publish_post(). The reason for bypassing wp_trash_post() is that it |
| 2888 | * will mutate the the post_content and the post_name when they should be |
| 2889 | * untouched. |
| 2890 | */ |
| 2891 | if ( ! EMPTY_TRASH_DAYS ) { |
| 2892 | wp_delete_post( $post_id, true ); |
| 2893 | } else { |
| 2894 | /** This action is documented in wp-includes/post.php */ |
| 2895 | do_action( 'wp_trash_post', $post_id ); |
| 2896 | |
| 2897 | add_post_meta( $post_id, '_wp_trash_meta_status', $post->post_status ); |
| 2898 | add_post_meta( $post_id, '_wp_trash_meta_time', time() ); |
| 2899 | |
| 2900 | $old_status = $post->post_status; |
| 2901 | $new_status = 'trash'; |
| 2902 | $wpdb->update( $wpdb->posts, array( 'post_status' => $new_status ), array( 'ID' => $post->ID ) ); |
| 2903 | clean_post_cache( $post->ID ); |
| 2904 | |