gmp_scan0gmp_scan1
(PHP 4 >= 4.0.4, PHP 5)
gmp_scan1 — Scan for 1
설명
int gmp_scan1
( resource $a
, int $start
)
Scans a, starting with bit start, towards more significant bits, until the first set bit is found.
반환값
Returns the index of the found bit, as an integer. If no set bit is found, -1 is returned.
예제
Example #1 gmp_scan1() example
<?php
// "1" bit is found at position 3. index starts at 0
$s1 = gmp_init("01000", 2);
echo gmp_scan1($s1, 0) . "\n";
// "1" bit is found at position 9. index starts at 5
$s2 = gmp_init("01000001111", 2);
echo gmp_scan1($s2, 5) . "\n";
?>
위 예제의 출력:
3 9
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