Formating a numeric String

[monkeytooth]

Looking for ideas and advise on this one. I want to take a 10 digit number and 1234567890 and format it like 132-456-7890 what would be my best bet as choice of methods to do this?

[sasa]

try

<?php
$test = 1234567890;
echo $test = substr($test, 0, 3).'-'. substr($test,3,3).'-'.substr($test,6);
?>