<?
if($_GET['action'] == 'play') {
 switch($_POST['colour']) {
  case 'all':
   $ball = array();
   while(count($ball) < 6) {
   $random_number = rand(1, 49);
   $stop = false;
    while(!$stop) {
     if(array_search($random_number, $ball) === false) {
      array_push($ball, $random_number);
      $stop = true;
     } else {
      $random_number = rand(1, 49);
     }
    }
   }
   if($mode == 0) {
    print join(', ', $ball);
   } else {
    foreach($ball as $value) {
     echo "<img  />";
    }
   }
   break;
  case 'red':
   $ball = array();
   while(count($ball) < 6) {
   $ball_number = array(1, 2, 7, 8, 12, 13, 18, 19, 23, 24, 29, 30, 34, 35, 40, 45, 46);
   $random_number = $ball_number[rand(0, 16)];
   $stop = false;
    while(!$stop) {
     if(array_search($random_number, $ball) === false) {
      array_push($ball, $random_number);
      $stop = true;
     } else {
      $random_number = $ball_number[rand(0, 16)];
     }
    }
   }
   if($mode == 0) {
    print join(', ', $ball);
   } else {
    foreach($ball as $value) {
     echo "<img  />";
    }
   }
   break;
  case 'green':
   $ball = array();
   while(count($ball) < 6) {
   $ball_number = array(5, 6, 11, 16, 17, 21, 22, 27, 28, 32, 33, 38, 39, 43, 44, 49);
   $random_number = $ball_number[rand(0, 15)];
   $stop = false;
    while(!$stop) {
     if(array_search($random_number, $ball) === false) {
      array_push($ball, $random_number);
      $stop = true;
     } else {
      $random_number = $ball_number[rand(0, 15)];
     }
    }
   }
   if($mode == 0) {
    print join(', ', $ball);
   } else {
    foreach($ball as $value) {
     echo "<img  />";
    }
   }
   break;
  case 'blue':
   $ball = array();
   while(count($ball) < 6) {
   $ball_number = array(3, 4, 9, 10, 14, 15, 20, 25, 26, 31, 36, 37, 41, 42, 47, 48);
   $random_number = $ball_number[rand(0, 15)];
   $stop = false;
    while(!$stop) {
     if(array_search($random_number, $ball) === false) {
      array_push($ball, $random_number);
      $stop = true;
     } else {
      $random_number = $ball_number[rand(0, 15)];
     }
    }
   }
   if($mode == 0) {
    print join(', ', $ball);
   } else {
    foreach($ball as $value) {
     echo "<img  />";
    }
   }
   break;
 }
}
?&gt;

請問以上代碼有邊度寫錯/有問題
請留言一一指出