$re = '/(.*)(@\s?)(.*[^(\s\(\d+\))])(\s\(\d+\))?/m';
$str = 'Title@ First Name Last Name (12)
Second Title@ First Name Last Name';
$subst = "$3";
$result = preg_replace($re, $subst, $str);
echo "The result of the substitution is ".$result;
Please keep in mind that these code samples are automatically generated and are not guaranteed to work. If you find any syntax errors, feel free to submit a bug report. For a full regex reference for PHP, please visit: http://php.net/manual/en/ref.pcre.php