protected function getSignaturesRegexp()
	{
		$signatures = array_map('preg_quote', array_keys($this->markupElements));

		$signaturesRegexp = '(?:' . join(')|(?:', $signatures) . ')';

		return $signaturesRegexp;
	}
protected function getSignaturesRegexp()
	{
		$signatures = array_map('preg_quote', array_keys($this->markupElements));

		$signaturesRegexp = '(?:' . join(')|(?:', $signatures) . ')';

		return $signaturesRegexp;
	}
protected function getSignaturesRegexp ( ) { $ signatures = array_map ( 'preg_quote' , array_keys ( $ this -> markupElements ) ) ; $ signaturesRegexp = '(?:' . join ( ')|(?:' , $ signatures ) . ')' ; return $ signaturesRegexp ; }
Returns regular expressiont to be used for matching for knwon signatures.
@return string
Returns regular expressiont to be used for matching for knwon signatures .