gmp_hamdist
(PHP 4 >= 4.0.4, PHP 5, PHP 7)
gmp_hamdist — 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
Return Values
The hamming distance between num1 and num2, 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
See Also
- gmp_popcount() - Population count
- gmp_xor() - Bitwise XOR
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https://www.php.net/manual/en/function.gmp-hamdist.php