wp_ajax_set_post_thumbnail()

2764function wp_ajax_set_post_thumbnail() {2765	$json = ! empty( $_REQUEST['json'] ); // New-style request.2766 2767	$post_id = (int) $_POST['post_id'];2768	if ( ! current_user_can( 'edit_post', $post_id ) ) {2769		wp_die( -1 );2770	}2771 2772	$thumbnail_id = (int) $_POST['thumbnail_id'];2773 2774	if ( $json ) {2775		check_ajax_referer( "update-post_$post_id" );2776	} else {2777		check_ajax_referer( "set_post_thumbnail-$post_id" );2778	}2779 2780	if ( -1 === $thumbnail_id ) {2781		if ( delete_post_thumbnail( $post_id ) ) {2782			$return = _wp_post_thumbnail_html( null, $post_id );2783			$json ? wp_send_json_success( $return ) : wp_die( $return );2784		} else {2785			wp_die( 0 );2786		}2787	}2788 2789	if ( set_post_thumbnail( $post_id, $thumbnail_id ) ) {2790		$return = _wp_post_thumbnail_html( $thumbnail_id, $post_id );2791		$json ? wp_send_json_success( $return ) : wp_die( $return );2792	}2793 2794	wp_die( 0 );2795}