Phone Number Field In join form . Help.

Yeah i know how to create a new field for the join form. What i need help with is that i want a phone number field which i would create and it would only accepts numbers.

I have a range of numbers to accept. 

Eg. 623xxxx

xxxx means it can be any number. but it must begin with 623. There is a list of numbers it could begin with, if it doesn't begin with those numbers then users can't join. Please help. HOw can i do this. Its only to accept 7 numbers in total. 

Help me Please. 

New field.

Type text.

In advanced set min to 7, max to 7 and check to return (bool) preg_match('/623\d{4}/', $arg0);

Thanks, But its not only one set of number range.. its many,..eg:

600xxxx

601xxxx

602xxxx

604xxxx 

etc..

how can i do that  check? o.O for all of them??

Sorry. I saw this, and assumed it must begin with 623.

Impossable to come up with a ruleset to restrict without knowing the full allowable numberset.

But if thay are all in the 600 range, then return (bool) preg_match('/6\d{6}/', $arg0);

The following is pseudocode, and I know know dolphin yet enough to tell you how to implement it. But hopefully you get the idea. If the the regular expression matches a prefix it will immediatly exit, if it never matches, it never returns true, so the default return of false is called when the foreach exits.

$acceptable_prefixes = array(

"123", "234", "456",

);

$counter = 0;

foreach ($acceptable_prefixes as $key=>$value) {

 if (preg_match('/'.$value.'\d{4}/', $arg0) ) {

return "success";

}

return "fail";

}

i did this:

return (bool) preg_match('/610\d{4}/',''/600\d{4}/','/601\d{4}/','/602\d{4}/',

'/604\d{4}/','/605\d{4}/','/607\d{4}/','/620\d{4}/',

'/621\d{4}/','/622\d{4}/','/623\d{4}/','/624\d{4}/',

'/625\d{4}/','/626\d{4}/','/627\d{4}/','/628\d{4}/',

'/629\d{4}/','/630\d{4}/','/631\d{4}/','/632\d{4}/',

'/633\d{4}/','/634\d{4}/','/635\d{4}/','/636\d{4}/',

'/637\d{4}/',

$arg0);

 but it didn't work. thats the entire number set. its from greater to or equal to 600 but less than or equal to 637. 

Nocare. But where do i write such a code? in a  file.. or in the check thing for the field? o.O 

No idea, I'm searching for how to do this for my own project. Trying to avoid hardcoding it into the script

Then it would be this.

return (bool) preg_match('/6[0-3][0-7]\d{4}/', $arg0);

Covers 6000000 to 6379999

Thanks for helping "NoCare" and deano92964 • :D

Deano, it worked. :D