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corey [works at] effim [delete] .com ¶
16 years ago
I see a lot of people trying to put together phone regex's and struggling (hey, no worries...they're complicated). Here's one that we use that's pretty nifty. It's not perfect, but it should work for most non-idealists.



*** Note: Only matches U.S. phone numbers. ***



<?php



// all on one line...

$regex = '/^(?:1(?:[. -])?)?(?:\((?=\d{3}\)))?([2-9]\d{2})(?:(?<=\(\d{3})\))? ?(?:(?<=\d{3})[.-])?([2-9]\d{2})[. -]?(\d{4})(?: (?i:ext)\.? ?(\d{1,5}))?$/';



// or broken up

$regex = '/^(?:1(?:[. -])?)?(?:\((?=\d{3}\)))?([2-9]\d{2})'

        .'(?:(?<=\(\d{3})\))? ?(?:(?<=\d{3})[.-])?([2-9]\d{2})'

        .'[. -]?(\d{4})(?: (?i:ext)\.? ?(\d{1,5}))?$/';



?>



If you're wondering why all the non-capturing subpatterns (which look like this "(?:", it's so that we can do this:



<?php



$formatted = preg_replace($regex, '($1) $2-$3 ext. $4', $phoneNumber);



// or, provided you use the $matches argument in preg_match



$formatted = "($matches[1]) $matches[2]-$matches[3]";

if ($matches[4]) $formatted .= " $matches[4]";



?>



*** Results: ***

520-555-5542 :: MATCH

520.555.5542 :: MATCH

5205555542 :: MATCH

520 555 5542 :: MATCH

520) 555-5542 :: FAIL

(520 555-5542 :: FAIL

(520)555-5542 :: MATCH

(520) 555-5542 :: MATCH

(520) 555 5542 :: MATCH

520-555.5542 :: MATCH

520 555-0555 :: MATCH

(520)5555542 :: MATCH

520.555-4523 :: MATCH

19991114444 :: FAIL

19995554444 :: MATCH

514 555 1231 :: MATCH

1 555 555 5555 :: MATCH

1.555.555.5555 :: MATCH

1-555-555-5555 :: MATCH

520-555-5542 ext.123 :: MATCH

520.555.5542 EXT 123 :: MATCH

5205555542 Ext. 7712 :: MATCH

520 555 5542 ext 5 :: MATCH

520) 555-5542 :: FAIL

(520 555-5542 :: FAIL

(520)555-5542 ext .4 :: FAIL

(512) 555-1234 ext. 123 :: MATCH

1(555)555-5555 :: MATCH
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