Classes/Service/ImageResizer.php
public function getDirectoryPattern($directory)
    {
        $pattern = '/^' . str_replace('/', '\\/', $directory) . '/';
        $pattern = str_replace('\\/**\\/', '\\/([^\/]+\\/)*', $pattern);
        $pattern = str_replace('\\/*\\/', '\\/[^\/]+\\/', $pattern);

        return $pattern;
    }
public function getDirectoryPattern($directory)
    {
        $pattern = '/^' . str_replace('/', '\\/', $directory) . '/';
        $pattern = str_replace('\\/**\\/', '\\/([^\/]+\\/)*', $pattern);
        $pattern = str_replace('\\/*\\/', '\\/[^\/]+\\/', $pattern);

        return $pattern;
    }
Returns a regular expression pattern to match directories.

@param string $directory
@return string