Method filesize

/**
 * Retrieve the file size of the path
 *
 * @return  mixed
 *
 * @since   1.7.0
 */
public function filesize()
{
    if (!$this->filename) {
        $this->setError(Text::_('JLIB_FILESYSTEM_ERROR_STREAMS_FILE_NOT_OPEN'));
        return false;
    }
    $retval = false;
    // Capture PHP errors
    $php_errormsg = '';
    $track_errors = ini_get('track_errors');
    ini_set('track_errors', true);
    $res = @filesize($this->filename);
    if (!$res) {
        $tmp_error = '';
        if ($php_errormsg) {
            // Something went wrong.
            // Store the error in case we need it.
            $tmp_error = $php_errormsg;
        }
        $res = FilesystemHelper::remotefsize($this->filename);
        if (!$res) {
            if ($tmp_error) {
                // Use the php_errormsg from before
                $this->setError($tmp_error);
            } else {
                // Error but nothing from php? How strange! Create our own
                $this->setError(Text::_('JLIB_FILESYSTEM_ERROR_STREAMS_FILE_SIZE'));
            }
        } else {
            $this->filesize = $res;
            $retval = $res;
        }
    } else {
        $this->filesize = $res;
        $retval = $res;
    }
    // Restore error tracking to what it was before.
    ini_set('track_errors', $track_errors);
    // Return the result
    return $retval;
}