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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 |
---|---|
3691 | delete_post_meta($post_id, '_wp_trash_meta_time'); |
3692 |
|
3693 | $meta = wp_get_attachment_metadata( $post_id ); |
3694 | $backup_sizes = get_post_meta( $post->ID, '_wp_attachment_backup_sizes', true ); |
3695 | $file = get_attached_file( $post_id ); |
3696 |
|
3697 | if ( is_multisite() ) |
3698 | delete_transient( 'dirsize_cache' ); |
3699 |
|
3700 | do_action('delete_attachment', $post_id); |
3701 |
|
3702 | wp_delete_object_term_relationships($post_id, array('category', 'post_tag')); |
3703 | wp_delete_object_term_relationships($post_id, get_object_taxonomies($post->post_type)); |
3704 |
|
3705 | $wpdb->query( $wpdb->prepare( "DELETE FROM $wpdb->postmeta WHERE meta_key = '_thumbnail_id' AND meta_value = %d", $post_id )); |
3706 |
|
3707 | $comment_ids = $wpdb->get_col( $wpdb->prepare( "SELECT comment_ID FROM $wpdb->comments WHERE comment_post_ID = %d", $post_id )); |
3708 | if ( ! empty( $comment_ids ) ) { |
3709 | do_action( 'delete_comment', $comment_ids ); |