(PHP 4 >= 4.0.4, PHP 5)
gmp_mod — Modulo operation
$n
   , resource $d
   )
   Calculates n modulo
   d. The result is always non-negative, the
   sign of d is ignored.
  
A GMP number resource.
Example #1 gmp_mod() example
<?php
$mod = gmp_mod("8", "3");
echo gmp_strval($mod) . "\n";
?>
The above example will output:
2