(PHP 4 >= 4.0.4, PHP 5, PHP 7, PHP 8)
gmp_mul — Multiply numbers
   Multiplies num1 by num2
   and returns the result.
  
num1
       A number that will be multiplied by num2.
      
 A GMP object, an int,
 or a string that can be interpreted as a number following the same logic
 as if the string was used in gmp_init() with automatic
 base detection (i.e. when base is equal to 0).
num2
       A number that will be multiplied by num1.
      
 A GMP object, an int,
 or a string that can be interpreted as a number following the same logic
 as if the string was used in gmp_init() with automatic
 base detection (i.e. when base is equal to 0).
A GMP object.
Example #1 gmp_mul() example
<?php
$mul = gmp_mul("12345678", "2000");
echo gmp_strval($mul) . "\n";
?>The above example will output:
24691356000
