(PHP 4 >= 4.0.4, PHP 5, PHP 7)
gmp_hamdist — Hamming distance
Returns the hamming distance between a and
b. Both operands should be non-negative.
a锟斤拷锟斤拷锟斤拷一锟斤拷 GMP 锟斤拷锟斤拷 resouce锟斤拷锟斤拷一锟斤拷锟斤拷锟斤拷转锟斤拷为锟斤拷值锟斤拷锟街凤拷锟斤拷锟斤拷
It should be positive.
b锟斤拷锟斤拷锟斤拷一锟斤拷 GMP 锟斤拷锟斤拷 resouce锟斤拷锟斤拷一锟斤拷锟斤拷锟斤拷转锟斤拷为锟斤拷值锟斤拷锟街凤拷锟斤拷锟斤拷
It should be positive.
GMP 锟斤拷值锟斤拷源.
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";
?>
锟斤拷锟斤拷锟斤拷锟教伙拷锟斤拷锟斤拷锟�
6 6