gmp_testbit(3) [php man page]

GMP_TESTBIT(3)								 1							    GMP_TESTBIT(3)

gmp_testbit - Tests if a bit is set

SYNOPSIS

       bool gmp_testbit (GMP  $a, int  $index)

DESCRIPTION

	Tests if the specified bit is set.

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 bit to test

RETURN VALUES

	Returns TRUE if the bit is set in resource $a, otherwise FALSE.

ERRORS
/EXCEPTIONS
	An E_WARNING level error is issued when $index is less than zero, and FALSE is returned.

EXAMPLES

       Example #1

	      gmp_testbit(3) example

	      <?php
	      $n = gmp_init("1000000");
	      var_dump(gmp_testbit($n, 1));
	      gmp_setbit($n, 1);
	      var_dump(gmp_testbit($n, 1));
	      ?>

	      The above example will output:

	      bool(false)
	      bool(true)

SEE ALSO

       gmp_setbit(3), gmp_clrbit(3).

PHP Documentation Group 													    GMP_TESTBIT(3)

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)