note 55208 added to ref.regex

I was having a ton of issues with other people's phone number validation expressions, so I made my own. It works with most US phone numbers, including those with extentions. Format matches any of the following formats: 5551234567 555 1234567 555 123 4567 555 123-4567 555-1234567 555-123-4567 555123-4567 (555)1234567 (555)123 4567 (555)123-4567 (555) 1234567 (555) 123-4567 (555) 123 4567 And any of the following extentions can be added with or without a space between them and the number: x123 x.123 x. 123 x 123 ext.123 ext. 123 ext 123 ext123 Extentions support between 1 and 5 digits. Here is the expression: $regex = '^[(]?[2-9]{1}[0-9]{2}[) -]{0,2}' . '[0-9]{3}[- ]?' . '[0-9]{4}[ ]?' . '((x|ext)[.]?[ ]?[0-9]{1,5})?$'; Enjoy! ---- Manual Page -- http://www.php.net/manual/en/ref.regex.php Edit -- http://master.php.net/manage/user-notes.php?action=edit+55208 Delete: added to the manual -- http://master.php.net/manage/user-notes.php?action=delete+55208&report=yes&reason=added+to+the+manual Delete: bad code -- http://master.php.net/manage/user-notes.php?action=delete+55208&report=yes&reason=bad+code Delete: spam -- http://master.php.net/manage/user-notes.php?action=delete+55208&report=yes&reason=spam Delete: useless -- http://master.php.net/manage/user-notes.php?action=delete+55208&report=yes&reason=useless Delete: non-english -- http://master.php.net/manage/user-notes.php?action=delete+55208&report=yes&reason=non-english Delete: other reasons -- http://master.php.net/manage/user-notes.php?action=delete+55208&report=yes Reject -- http://master.php.net/manage/user-notes.php?action=reject+55208&report=yes Search -- http://master.php.net/manage/user-notes.php