Php/docs/function.gmp-hamdist
gmp_hamdist
(PHP 4 >= 4.0.4, PHP 5, PHP 7)
gmp_hamdist — Hamming distance
Description
Returns the hamming distance between a and
b. Both operands should be non-negative.
Parameters
aEither 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.
It should be positive.
bEither 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.
It should be positive.
Return Values
The hamming distance between a and b, as an int.
Examples
Example #1 gmp_hamdist() example
<?php$ham1 = gmp_init("1001010011", 2);$ham2 = gmp_init("1011111100", 2);echo gmp_hamdist($ham1, $ham2) . "\n";/* hamdist is equivalent to: */echo gmp_popcount(gmp_xor($ham1, $ham2)) . "\n";?>
The above example will output:
6 6
