(PHP 4 >= 4.0.4, PHP 5, PHP 7)
gmp_clrbit — Clear bit
gmp_clrbit ( GMP $num , int $index ) : void
Clears (sets to 0) bit index in num. The index starts at 0.
num
A GMP object, an int or a numeric string.
index
The index of the bit to clear. Index 0 represents the least significant bit.
A GMP object.
Example #1 gmp_clrbit() example
<?php
$a = gmp_init("0xff");
gmp_clrbit($a, 0); // index starts at 0, least significant bit
echo gmp_strval($a) . "\n";
?> The above example will output:
254
Note:
Unlike most of the other GMP functions, gmp_clrbit() must be called with a GMP object that already exists (using gmp_init() for example). One will not be automatically created.
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https://www.php.net/manual/en/function.gmp-clrbit.php