WordPress at a glance
function is not described

update_gallery_tab() WP 2.5.0

Adds the gallery tab back to the tabs array if post has image attachments

  • Global. wpdb. $wpdb WordPress database abstraction object.

No Hooks.

Return

Array. $tabs with gallery if post has image attachment

Usage

update_gallery_tab( $tabs );
$tabs(array) (required)

Code of update gallery tab: wp-admin/includes/media.php VER 5.0.3

<?php
function update_gallery_tab($tabs) {
	global $wpdb;

	if ( !isset($_REQUEST['post_id']) ) {
		unset($tabs['gallery']);
		return $tabs;
	}

	$post_id = intval($_REQUEST['post_id']);

	if ( $post_id )
		$attachments = intval( $wpdb->get_var( $wpdb->prepare( "SELECT count(*) FROM $wpdb->posts WHERE post_type = 'attachment' AND post_status != 'trash' AND post_parent = %d", $post_id ) ) );

	if ( empty($attachments) ) {
		unset($tabs['gallery']);
		return $tabs;
	}

	$tabs['gallery'] = sprintf(__('Gallery (%s)'), "<span id='attachments-count'>$attachments</span>");

	return $tabs;
}