The gmp_mul() function in PHP is an inbuilt function which is used to multiply two GMP numbers (GNU Multiple Precision: For large numbers).
Syntax:
GMP gmp_mul ( GMP $num1, GMP $num2 )
Parameters: This function accepts two GMP numbers. It is mandatory parameters as shown in the above syntax. These can be a GMP object in PHP version 5.6 and later, or a numeric string provided that it is possible to convert the latter to a number. This function multiplies these two numbers and returns it.
Return Value: This function returns a GMP number which is multiplication of the two numbers passed as parameter.
Examples:
Input : num1 = "123456789"
num2 = "987654321"
Output: 121932631112635269
Input : num1 = "9999999"
num2 = "99999"
Output: 999989900001
Below programs illustrate the gmp_mul() function in PHP:
Program 1:
<?php $mul = gmp_mul("562817", "713645"); echo gmp_strval($mul); ?> |
Output:
401651537965
Program 2:
<?php $mul = gmp_mul("123456789", "987654321"); echo gmp_strval($mul); ?> |
Output:
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121932631112635269
