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<form><input type=text name="o"><input type=submit value="go"></form><?php function m($o=NULL){	$r = "Bitwise result of <b>'$o'</b> is: ";	switch($o){		case (($o%1024)===0): $r .= '1024, ';		case (($o% 512)===0): $r .=  '512, ';		case (($o% 256)===0): $r .=  '256, ';		case (($o% 128)===0): $r .=  '128, ';		case (($o% 64)===0):  $r .=   '64, ';		case (($o% 32)===0):  $r .=   '32, ';		case (($o% 16)===0):  $r .=   '16, ';		case (($o%  8)===0):  $r .=    '8, ';		case (($o%  4)===0):  $r .=    '4, ';		case (($o%  2)===0):  $r .=    '2, ';		case (($o%  1)===0):  $r .=    '1, ';		case (($o%  0)===0):  $r .=    '0';	}	return ($r);} //$mif($_GET["o"] != NULL){	echo '<pre>'.m($_GET["o"]).'</pre>';}//http://www.php.net/manual/en/language.operators.bitwise.php?>