php man page for gmp_clrbit

GMP_CLRBIT(3)								 1							     GMP_CLRBIT(3)

gmp_clrbit - Clear bit

SYNOPSIS
       void gmp_clrbit (GMP  $a, int  $index)

DESCRIPTION
	Clears (sets to 0) bit $index in $a. The index starts at 0.

PARAMETERS
	      o $a
		-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 $index
		- The index of the bit to clear. Index 0 represents the least significant bit.

RETURN VALUES
	A GMP number resource in PHP 5.5 and earlier, or a GMP object in PHP 5.6 and later.

EXAMPLES
       Example #1

	      gmp_clrbit(3) example

	      <?php
	      $a = gmp_init("0xff");
	      gmp_clrbit($a, 0); // index starts at 0, least significant bit
	      echo gmp_strval($a) . "
";
	      ?>

	      The above example will output:

	      254

NOTES
       Note

	       Unlike most of the other GMP functions, gmp_clrbit(3) must be called with a GMP resource that already exists (using gmp_init(3) for
	      example). One will not be automatically created.

SEE ALSO
       gmp_setbit(3), gmp_testbit(3).

PHP Documentation Group 													     GMP_CLRBIT(3)