$re = '/(?:(?:\+\(?[0-9]{1,3}|\(?\b[0-9]{4})\)?)?\h*\)?[-\h.]?\(?[0-9]{1,3}\)?[-\h.]?[0-9]{3}[-\h.]?[0-9]{3,4}/m';
$str = '+1555555555
+4974339296
+591 74339296
+1 555 555 5554
+(591) 7433433
+(591) (4) 6434850
0591 74339296
0001 5555555555
(0001) 5555555
59145678464
3298494333';
preg_match_all($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