add delimiters to a phone number - php

Question

I need to turn this phone number:
5555555555
into this string with delimiters:
"555.555.5555"
Here's my code:
$phone = 5555555555;
$phoneArray = explode(2, $phone);
print_r($phoneArray);
and it returns this:
Array ( [0] => 555 [1] => [2] => 55555 )
What am I doing wrong?

Answer 1

Lots of ways to do this, and RegEx not required, but here's a nice and easy one w/ RegEx:
$phone = '5555555555';
echo preg_replace('/(\d{3})(\d{3})(\d{4})/', "$1.$2.$3", $phone);
Cheers

Answer 2

You need something more like this:
$number = '123456789';
$segments = array();
$segments[] = substr($number, 0, 3);
$segments[] = substr($number, 3, 3);
$segments[] = substr($number, 6, 4);
$number = implode('.', $segments); // Comes out to 123.456.7890
Note that you'll want to do some format checking first. You'll need to verify
that they actually entered a 10-digit number with no dividing symbols.

Answer 3

You probably don't want to use explode since you don't have a known delimiter within the string to cause the split. You could use str_split($phone,3) which would give you 3 array elements of 3, and a 4th of 1. Keep the first two and merge the final two together into your 3rd array elemnent:
$phone = 5555555555;
$phoneArray = str_split($phone,3);
$phoneArray[2] .= phoneArray[3];
print_r($phoneArray);
Hope that helps.