php man page for gmp_add

GMP_ADD(3)								 1								GMP_ADD(3)

gmp_add - Add numbers

SYNOPSIS
       GMP gmp_add (GMP  $a, GMP  $b)

DESCRIPTION
	Add two numbers.

PARAMETERS
	      o $a
		-  A  number  that  will  be  added.  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.

	      o $b
		- A number that will be added. 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.

RETURN VALUES
	A GMP number representing the sum of the arguments.

EXAMPLES
       Example #1

	      gmp_add(3) example

	      <?php
	      $sum = gmp_add("123456789012345", "76543210987655");
	      echo gmp_strval($sum) . "
";
	      ?>

	      The above example will output:

	      200000000000000

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