(PHP 4 >= 4.0.4, PHP 5, PHP 7)
Scan for 0
int gmp_scan0 ( GMP $a, int $start )
Scans a, starting with bit start, towards more significant bits, until the first clear bit is found.
Parameters:
a
The number to scan.
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.
start
The starting bit.
Returns:
Returns the index of the found bit, as an integer. The index starts from 0.
Examples:
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";
?>
The above example will output:
3 7
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