gmp_scan0

(PHP 4 >= 4.0.4, PHP 5, PHP 7)

gmp_scan0 — Scan for 0

˵��

gmp_scan0 ( GMP $a , int $start ) : int

Scans a, starting with bit start, towards more significant bits, until the first clear bit is found.

����

a

The number to scan.

������һ�� GMP ���� resouce����һ������ת��Ϊ��ֵ���ַ�����

start

The starting bit.

����ֵ

Returns the index of the found bit, as an integer. The index starts from 0.

����

Example #1 gmp_scan0() example

<?php
// "0" bit is found at position 3. index starts at 0
$s1 = gmp_init("10111", 2);
echo gmp_scan0($s1, 0) . "\n";

// "0" bit is found at position 7. index starts at 5
$s2 = gmp_init("101110000", 2);
echo gmp_scan0($s2, 5) . "\n";
?>

�������̻������

3
7