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PHP Video Toolbox 0.1.3 (Default branch)
04-07-2008
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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)