(PHP 4 >= 4.0.4, PHP 5, PHP 7)
gmp_div_r — Remainder of the division of numbers
   Calculates remainder of the integer division of
   n by d. The
   remainder has the sign of the n argument,
   if not zero.
  
nThe number being divided.
Either a GMP number resource in PHP 5.5 and earlier, a GMP object in PHP 5.6 and later, or a numeric string provided that it is possible to convert the latter to a number.
d
       The number that n is being divided by.
      
Either a GMP number resource in PHP 5.5 and earlier, a GMP object in PHP 5.6 and later, or a numeric string provided that it is possible to convert the latter to a number.
round
       See the gmp_div_q() function for description
       of the round argument.
      
The remainder, as a GMP number.
Example #1 gmp_div_r() example
<?php
$div = gmp_div_r("105", "20");
echo gmp_strval($div) . "\n";
?>
The above example will output:
5