Question

I am having the dang-est time trying to write a regex that will extract the phone extension from a full phone number string. This should work on a number like this one: 777.777.7777 x 7302

It should also work using “ext”, “EXT”, “Ext”, “eXt”, “ext.”, and “Ext “. Essentially just cover all the common ground use of it.

I just need the “x 7302” part. In fact I am just going to strip it down to just the extension number once I extract it.

Can anyone help me please? Regular expressions are something that I struggle with when they get more complex.

I am doing this in a PHP function (preg_match) if that will help anyone.

Answer 1

try with regex:

/e?xt?\.?\s*\d+$/i 

<?

echo "<pre>";
     $phone = '777.777.7777 x 7302'; 
        preg_match("/e?xt?\.?\s*\d+$/i", $phone, $matched); 
        print_r($matched);
?>

Output:

Array
(
    [0] => x 7302
)