終極密碼

<?php
 $min=1;
 $max=100;
 $password=rand(1,$max);
 echo "密碼 : ".$password."<br>";
 $index=1;
 while(true){
     echo "第".$index."次 : ";
     $guess=rand($min+1, $max-1);
     echo $guess;
     if($guess==$password){
         echo "&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<==bingo";
         break;
     }
     else if ($guess<$password)
         $min=$guess;
     else
         $max=$guess;
     echo " 介於 $min ~ $max 之間";
     $index++;
     echo "<br>";
 }
?>