$re = '/:\s\+?(\(?[0-9]+\)?\s?)+/m';
$str = 'tel/mob: 001 433 123 4352
tel/mob: 0014331234352
tel: 001 433 123 4352
tel: 0014331234352
tel/mob: 001 (433) 123 4352
tel: 001 (433) 123 4352
tel/mob: +1 433 123 4352
tel/mob: +14331234352
tel: +1 433 123 4352
tel: +14331234352
tel/mob: +1 (433) 123 4352
tel: +1 (433) 123 4352';
preg_match_all($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