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PHP. Руководство по PHP. 2005 (создание и продвижение сайта)

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PHP. Руководство по PHP. 2005

gmp_hamdist

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gmp_hamdist

(PHP 4>= 4.0.4, PHP 5)gmp_hamdist -- Hamming distance

Description

int gmp_hamdist (resource a, resource b)

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

Пример 1. gmp_hamdist() example

<?php $ham1 = gmp_init("1001010011", 2); $ham2 = gmp_init("10100", 2); echo gmp_hamdist($ham1, $ham2) . "\n"; /* hamdist is equivilent to: */ echo gmp_popcount(gmp_xor($ham1, $ham2)) . "\n"; ?>

The printout of the above program will be:

6
6

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