CODEWITHSUNDEEP
phpregexphone-number
Patrick
Patrick

Reputation: 3440

A regular expression to extract a business extension from a phone number

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.

Upvotes: 0

Views: 1083

Answers (7)

Pedro Lobito
Pedro Lobito

Reputation: 98961

Try this function:

$pn = "777.777.7777 x 7302"; 

function get_ext($pn)
{
$ext = preg_replace('/[\d\.\s]+[ext\s]+(\d{1,})/i', '$1', $pn);
return $ext;
}

echo get_ext($pn);
//7302

Upvotes: 0

The Mask
The Mask

Reputation: 17427

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
)

Upvotes: 4

hypervisor666
hypervisor666

Reputation: 1275

I am a bit leery of regular expression, so I'm a bit biased when I say, is it possible to just split the string using the PHP function "explode()", using the 'x' character as your delimiter?

Here is a link to the PHP manual for that function if you are not familiar with it:

Explode()

Upvotes: 0

jeroen
jeroen

Reputation: 91742

If you just want the last numbers of the string, you can use:

\D+(\d+)$

\D+ at least one non-digit followed by:

(\d+) at least one digit (captured using parenthesis)

$ at the end of the string.

Upvotes: 0

cordsen
cordsen

Reputation: 1701

This should do it for you

/([\d\-\.]+)([ext\. ]+)(\d+)/i

The first set matches the numbers separated by dash or dot. The second set matches your extension string and the third set matches your extension number.

Upvotes: 0

Gursel Koca
Gursel Koca

Reputation: 21300

\w+\s*\d+$

It is an simpler regex assuming that the input is similar to what you have provided.

Upvotes: 0

hakre
hakre

Reputation: 198119

This probably helps to give you something to play with:

$phonenumber = '777.777.7777 x 7302';

$extension = preg_replace('(^.*(ext|x) ?([0-9]+)$)i', '$2', $phonenumber);

echo $extension;

Use the i modifier (at the end) to make the regex case insensitive so to match all combinations of ext. I used a group to offer both variant: ext or x: (ext|x).

The rest is looking for a number at the end, and a space is possible between EXT and the number.

Upvotes: 5

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