Im looking for the best way to do the following, i tried myself but its over my head.

Users will enter a letter/number string into a form like the one below:
G11223344556677

I need a script to check that the first character is a letter, the rest of the characters are numbers and that the string is 15 characters long.

Furthermore, i need to seperate the last 6 numbers into variables in sets of two. the result should look like:

PHP Code:

$lastset==77;
$middleser==66;
$firstset==55; 


I should be able to figure out the rest myself hopefully . Thanks for all your help much appreciated.

Okay. I'm very tired right now, but I'll try to help.

PHP Code:

<?php
$string = 'G11223344556677';
if (preg_match('/\w\d{14}/i',$string))
 {
  $a1 = substr($string,-2,2);
  $a2 = substr($string,-4,2);
  $a3 = substr($string,-6,2);
  echo $a1.$a2.$a3;
 }
else
 echo '**** seem to be wrong string';
?>

Thanks very much. Works great.