php man page for decbin

DECBIN(3)								 1								 DECBIN(3)

decbin - Decimal to binary

SYNOPSIS
       string decbin (int  $number)

DESCRIPTION
	Returns a string containing a binary representation of the given $number argument.

PARAMETERS
	      o $number
		- Decimal value to convert

	      Range of inputs on 32-bit machines

	      +-------------------------------------+--------------------------------------+---+
	      | 	 positive $number	    |					   |   |
	      | 				    |					   |   |
	      | 				    |		negative $number	   |   |
	      | 				    |					   |   |
	      | 				    |		  return value		   |   |
	      | 				    |					   |   |
	      +-------------------------------------+--------------------------------------+---+
	      | 		0		    |					   |   |
	      | 				    |					   |   |
	      | 				    |					   |   |
	      | 				    |		     |T{ 0		   |   |
	      | 				    |					   |   |
	      | 		1		    |					   |   |
	      | 				    |					   |   |
	      | 				    |					   |   |
	      | 				    |		     |T{ 1		   |   |
	      | 				    |					   |   |
	      | 		2		    |					   |   |
	      | 				    |					   |   |
	      | 				    |					   |   |
	      | 				    |		     |T{ 10		   |   |
	      | 				    |					   |   |
	      | 				    |					   |   |
	      | 	    2147483646		    |					   |   |
	      | 				    |					   |   |
	      | 				    |					   |   |
	      | 				    | |T{ 1111111111111111111111111111110  |   |
	      | 				    |					   |   |
	      |2147483647 (largest signed integer)  |					   |   |
	      | 				    |					   |   |
	      | 				    |					   |   |
	      | 				    | |T{  1111111111111111111111111111111 |   |
	      | 				    | (31 1's)				   |   |
	      | 				    |					   |   |
	      | 	    2147483648		    |					   |   |
	      | 				    |					   |   |
	      | 				    |		  -2147483648		   |   |
	      | 				    |					   |   |
	      | 				    |	10000000000000000000000000000000   |   |
	      | 				    |					   |   |
	      | 				    |					   |   |
	      | 	    4294967294		    |					   |   |
	      | 				    |					   |   |
	      | 				    |		       -2		   |   |
	      | 				    |					   |   |
	      | 				    |	11111111111111111111111111111110   |   |
	      | 				    |					   |   |
	      |4294967295 (largest  unsigned  inte- |					   |   |
	      |ger)				    |					   |   |
	      | 				    |					   |   |
	      | 				    |		       -1		   |   |
	      | 				    |					   |   |
	      | 				    | 11111111111111111111111111111111 (32 |   |
	      | 				    | 1's)				   |   |
	      | 				    |					   |   |
	      +-------------------------------------+--------------------------------------+---+
	      Range of inputs on 64-bit machines

	      +-------------------------------------+------------------------------------------------------------------+---+
	      | 	 positive $number	    |								       |   |
	      | 				    |								       |   |
	      | 				    |			      negative $number			       |   |
	      | 				    |								       |   |
	      | 				    |				return value			       |   |
	      | 				    |								       |   |
	      +-------------------------------------+------------------------------------------------------------------+---+
	      | 		0		    |								       |   |
	      | 				    |								       |   |
	      | 				    |								       |   |
	      | 				    |				   |T{ 0			       |   |
	      | 				    |								       |   |
	      | 		1		    |								       |   |
	      | 				    |								       |   |
	      | 				    |								       |   |
	      | 				    |				   |T{ 1			       |   |
	      | 				    |								       |   |
	      | 		2		    |								       |   |
	      | 				    |								       |   |
	      | 				    |								       |   |
	      | 				    |				   |T{ 10			       |   |
	      | 				    |								       |   |
	      | 				    |								       |   |
	      |        9223372036854775806	    |								       |   |
	      | 				    |								       |   |
	      | 				    |								       |   |
	      | 				    | |T{							       |   |
	      | 				    | 111111111111111111111111111111111111111111111111111111111111110  |   |
	      | 				    |								       |   |
	      |9223372036854775807 (largest  signed |								       |   |
	      |integer) 			    |								       |   |
	      | 				    |								       |   |
	      | 				    |								       |   |
	      | 				    | |T{							       |   |
	      | 				    | 111111111111111111111111111111111111111111111111111111111111111  |   |
	      | 				    | (63 1's)							       |   |
	      | 				    |								       |   |
	      | 				    |								       |   |
	      |      |T{ -9223372036854775808	    |								       |   |
	      | 				    |								       |   |
	      | 				    | 1000000000000000000000000000000000000000000000000000000000000000 |   |
	      | 				    |								       |   |
	      | 				    |								       |   |
	      | 				    |								       |   |
	      | 	      |T{ -2		    |								       |   |
	      | 				    |								       |   |
	      | 				    | 1111111111111111111111111111111111111111111111111111111111111110 |   |
	      | 				    |								       |   |
	      | 				    |								       |   |
	      | 	      |T{ -1		    |								       |   |
	      | 				    |								       |   |
	      | 				    | 1111111111111111111111111111111111111111111111111111111111111111 |   |
	      | 				    | (64 1's)							       |   |
	      | 				    |								       |   |
	      +-------------------------------------+------------------------------------------------------------------+---+
RETURN VALUES
	Binary string representation of $number

EXAMPLES
       Example #1

	      decbin(3) example

	      <?php
	      echo decbin(12) . "
";
	      echo decbin(26);
	      ?>

	      The above example will output:

	      1100
	      11010

SEE ALSO
       bindec(3),  decoct(3), dechex(3), base_convert(3), printf(3), using %b, %032b or %064b as the format , sprintf(3), using %b, %032b or %064b
       as the format .

PHP Documentation Group 														 DECBIN(3)