GMP_HAMDIST(3) 1 GMP_HAMDIST(3)
gmp_hamdist - Hamming distance
SYNOPSIS
int gmp_hamdist (GMP $a, GMP $b)
DESCRIPTION
Returns the hamming distance between $a and $b. Both operands should be non-negative.
PARAMETERS
o $a
-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. It should be positive.
o $b
-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. It should be positive.
RETURN VALUES
A GMP number resource in PHP 5.5 and earlier, or a GMP object in PHP 5.6 and later.
EXAMPLES
Example #1
gmp_hamdist(3) example
<?php
$ham1 = gmp_init("1001010011", 2);
$ham2 = gmp_init("1011111100", 2);
echo gmp_hamdist($ham1, $ham2) . "
";
/* hamdist is equivalent to: */
echo gmp_popcount(gmp_xor($ham1, $ham2)) . "
";
?>
The above example will output:
6
6
SEE ALSO
gmp_popcount(3), gmp_xor(3).
PHP Documentation Group GMP_HAMDIST(3)
