$re = '/\(?\d{3}\)?[- ]\d{3}-\d{4}/';
$str = '888-555-4444
My phone number is (871) 518-1912 okay?
This thing is kuhl and my phone number is 67-19191-191
What was my number? Oh, it\'s 6710910919
';
preg_match_all($re, $str, $matches, PREG_SET_ORDER, 0);
// Print the entire match result
var_dump($matches);
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