_wp_delete_all_temp_backups

WordPress Version: 6.4

/**
 * Deletes all contents in the temporary backup directory.
 *
 * @since 6.3.0
 *
 * @access private
 *
 * @global WP_Filesystem_Base $wp_filesystem WordPress filesystem subclass.
 *
 * @return void|WP_Error Void on success, or a WP_Error object on failure.
 */
function _wp_delete_all_temp_backups()
{
    global $wp_filesystem;
    if (!function_exists('WP_Filesystem')) {
        require_once ABSPATH . '/wp-admin/includes/file.php';
    }
    ob_start();
    $credentials = request_filesystem_credentials('');
    ob_end_clean();
    if (false === $credentials || !WP_Filesystem($credentials)) {
        return new WP_Error('fs_unavailable', __('Could not access filesystem.'));
    }
    if (!$wp_filesystem->wp_content_dir()) {
        return new WP_Error(
            'fs_no_content_dir',
            /* translators: %s: Directory name. */
            sprintf(__('Unable to locate WordPress content directory (%s).'), 'wp-content')
        );
    }
    $temp_backup_dir = $wp_filesystem->wp_content_dir() . 'upgrade-temp-backup/';
    $dirlist = $wp_filesystem->dirlist($temp_backup_dir);
    $dirlist = $dirlist ? $dirlist : array();
    foreach (array_keys($dirlist) as $dir) {
        if ('.' === $dir || '..' === $dir) {
            continue;
        }
        $wp_filesystem->delete($temp_backup_dir . $dir, true);
    }
}