gmp_hamdist
PHP function
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(PHP 4 >= 4.0.4, PHP 5, PHP 7, PHP 8)
Hamming distance
Description
gmp_hamdist(GMP|int|string $num1, GMP|int|string $num2): int
Returns the hamming distance between num1 and num2. Both operands should be non-negative.
Parameters
num1Parameter
It should be positive.
num2Parameter
It should be positive.
Return Values
The hamming distance between num1 and num2, as an int.
Examples
gmp_hamdist() example
php
<?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:
output
6
6