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<?php // convert decimal to base 2 without using base_convert or printf $base = 2; $decnum = 23; $num = 23; $stack = array(); while( $num > 0) { $arr[] = $num % $base; // store remainder in array $num = floor($num/$base); // no integer division } var_dump($arr); $wrong = join('',$arr); var_dump($wrong); $cat = join('',array_reverse($arr)); var_dump($cat); printf("%b\n",$decnum); echo base_convert(23,10,2); // now using the stack while( $decnum > 0) { array_push($stack,($num % $base)); // store remainder on stack $decnum = floor($decnum/$base); // no integer division } var_dump($stack); for ($i=0,$max = count($stack);$i < $max; $i++) { echo array_pop($stack); } echo "\n";
Output for 4.3.0 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
array(5) { [0]=> int(1) [1]=> int(1) [2]=> int(1) [3]=> int(0) [4]=> int(1) } string(5) "11101" string(5) "10111" 10111 10111array(5) { [0]=> int(0) [1]=> int(0) [2]=> int(0) [3]=> int(0) [4]=> int(0) } 00000