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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 |
---|---|
3024 | } |
3025 |
|
3026 | /** This filter is documented in wp-includes/post.php */ |
3027 | $check = apply_filters( 'pre_trash_post', null, $post ); |
3028 | if ( null !== $check ) { |
3029 | return $check; |
3030 | } |
3031 |
|
3032 | /** This action is documented in wp-includes/post.php */ |
3033 | do_action( 'wp_trash_post', $post_id ); |
3034 |
|
3035 | add_post_meta( $post_id, '_wp_trash_meta_status', $post->post_status ); |
3036 | add_post_meta( $post_id, '_wp_trash_meta_time', time() ); |
3037 |
|
3038 | $old_status = $post->post_status; |
3039 | $new_status = 'trash'; |
3040 | $wpdb->update( $wpdb->posts, array( 'post_status' => $new_status ), array( 'ID' => $post->ID ) ); |
3041 | clean_post_cache( $post->ID ); |
3042 |
|