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gmp_hamdist

Hamming distance (PHP 4 >= 4.0.4, PHP 5)
int gmp_hamdist ( resource a, resource b )

Returns the hamming distance between a and b. Both operands should be non-negative.

Parameters

a

It can be either a GMP number resource, or a numeric string given that it is possible to convert the latter to a number.

It should be positive.

b

It can be either a GMP number resource, or a numeric string given that it is possible to convert the latter to a number.

It should be positive.

Return Values

A GMP number resource.

Examples

Example 793. gmp_hamdist() example

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<?php

$ham1 = gmp_init("1001010011", 2);

$ham2 = gmp_init("1011111100", 2);

echo gmp_hamdist($ham1, $ham2) . "\n";



/* hamdist is equivilent to: */

echo gmp_popcount(gmp_xor($ham1, $ham2)) . "\n";

?>

The above example will output: