gmp_scan1
gmp_scan1
(PHP 4 >= 4.0.4, PHP 5, PHP 7)
gmp_scan1 — Scan for 1
Description
int gmp_scan1 ( GMP $a , int $start )
Scans a, starting with bit start, towards more significant bits, until the first set bit is found.
Parameters
Return Values
Returns the index of the found bit, as an integer. If no set bit is found, -1 is returned.
Examples
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";
?> The above example will output:
3 9
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https://secure.php.net/manual/en/function.gmp-scan1.php
