1 function test($var){ 2  3         $func = function($i){ 4                 if($i < 2){ 5                         return $i; 6                 } 7  8                 $return[‘int‘] = intval( $i / 2 ); 9                 $return[‘remain‘] = $i % 2;10 11                 return $return;12         };13 14         $arr = array();15 16         while($var > 1){17                 $result = $func($var);18 19                 $var = $result[‘int‘];20                 array_unshift($arr,$result[‘remain‘]);21         }22 23         $var && array_unshift($arr,$var);24 25         return implode(‘‘,$arr);26 }27 28 $int = 778988;29 30 echo test($int)."\r\n";

 1 $str = ‘10111110001011101100‘; 2  3 function test($var){ 4         $len = strlen($var); 5  6         $return = 0; 7  8         for($pos=0;$pos<$len;$pos++){ 9 10                 $key = $pos == 0 ? 1 : $key * 2;11 12                 $int = intval(substr($var,$ken-$pos-1,1));13 14                 $int >0 && $return += $key;15 16         }17 18         return $return;19 }20 21 echo test($str)."\r\n";