The gmp_clrbit() function is an in-built function in PHP which clears a bit of a GMP number (GNU Multiple Precision). The gmp_clrbit() function sets the bit at a specified index in a GMP number to 0. The index starts at zero from the least significant bit.
gmp_clrbit( $num, $index )
Parameters: The function accepts two mandatory parameters $num and $index as shown in the above syntax. These parameters are :-
- $num : It can be either a GMP number resource in PHP 5.5 or a GMP object in PHP version 5.6 and later, or numeric strings can be passed to the function provided that it is possible to convert those strings to numbers.
- $index : The index of the bit to be cleared.The indexing starts from 0 where index 0 represents the least significant bit..
Return Values : This function returns a GMP number (in PHP 5.5 and earlier) or a GMP object (in PHP 5.6 and later) which is the number formed after the bit at the specified index is set to 0.
Input : $num = 255, $index = 0 Output : 254 Input : $num = 128, $index = 7 Output : 0
Below programs illustrate the gmp_clrbit() function :
Reference : http://php.net/manual/en/function.gmp-clrbit.php
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