On 12/29/2010 4:35 PM, Daniel P. Brown wrote:
> On Wed, Dec 29, 2010 at 19:12, Ethan Rosenberg <ethros@xxxxxxxxxxxxx> wrote:
>> Dear List -
>>
>> Thank you for all your help in the past.
>>
>> Here is another one....
>>
>> I would like to have a regex which would validate that a telephone number
>> is in the format xxx-xxx-xxxx.
>
> Congrats. People in Hell would like ice water. Now we all know
> that everyone wants something. ;-P
>
> Really, this isn't a PHP question, but rather one of regular
> expressions. That said, something like this (untested) should work:
>
> <?php
>
> $numbers = array(
> '123-456-7890',
> '2-654-06547',
> 'sf34-asdf-',
> 'abc-def-ghij',
> '555_555_5555',
> '000-000-0000',
> '8007396325',
> '241-555-2091',
> '800-555-0129',
> '900-976-739',
> '5352-342=452',
> '200-200-2000',
> );
>
> foreach ($numbers as $n) {
> echo $n.(validate_phone($n) ? ' is ' : ' is not ').'a valid
> US/Canadian telephone number.'.PHP_EOL;
> }
>
>
> function validate_phone($number) {
>
> if (preg_match('/^[2-9]{1,}[0-9]{2,}\-[2-9]{1,}[0-9]{2,}\-[0-9]{4,}$/',trim($number)))
> {
> return true;
> }
>
> return false;
> }
> ?>
>
>
Actually...
Specified here [1] it says that the {1,} is the same as '+'. I think you should
drop the comma. If you don't this would be valid 844-2345-123456
^[2-9]{1,}[0-9]{2,}\-[2-9]{1,}[0-9]{2,}\-[0-9]{4,}$
should be
^[2-9]{1}[0-9]{2}\-[2-9]{1}[0-9]{2}\-[0-9]{4}$
1 http://us.php.net/manual/en/regexp.reference.repetition.php
Jim Lucas
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