Clears (sets to 0) bit index in
a. The index starts at 0.
Замечание:
Unlike most of the other GMP functions, gmp_clrbit()
must be called with a GMP resource that already exists (using
gmp_init() for example). One will not be
automatically created.
Пример 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"; ?>