GMP_SCAN0(3) 1 GMP_SCAN0(3)
gmp_scan0 - Scan for 0
SYNOPSIS
int gmp_scan0 (GMP $a, int $start)
DESCRIPTION
Scans $a, starting with bit $start, towards more significant bits, until the first clear bit is found.
PARAMETERS
o $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.
o $start
- The starting bit.
RETURN VALUES
Returns the index of the found bit, as an integer. The index starts from 0.
EXAMPLES
Example #1
gmp_scan0(3) example
<?php
// "0" bit is found at position 3. index starts at 0
$s1 = gmp_init("10111", 2);
echo gmp_scan0($s1, 0) . "
";
// "0" bit is found at position 7. index starts at 5
$s2 = gmp_init("101110000", 2);
echo gmp_scan0($s2, 5) . "
";
?>
The above example will output:
3
7
PHP Documentation Group GMP_SCAN0(3)
