PHP大賽邏輯

Question

在我的一個在PHP應用程序中有一個比賽部分。它包含多個選項10個問題，每個都有4個選項。

用戶填寫我保存的答案作爲DB逗號分隔值表格後。像如下：

user | answer 
------------------------------------- 
112 | 1,7,8,9,8,5,2,3,6,7,9,6 

我得到了接聽鍵一樣使用的填充接聽鍵..

什麼是評估用戶的輸入，並找出得分最高的用戶的最佳方法的邏輯？

Answer 1

正如評論所說，這不是存儲數據的最佳方式，但我評價是這樣的：

$query = mysql_query("select * from `table` where 1",CONNECTION_IDENTIFIER) or die("die message"); 
$answer_key = array(answer1,answer2,etc); 
$high_score = 0; 
$high_scorer= ""; 
while($r=mysql_fetch_array($query)){ 
    $users_answers = explode(',',$r['answer']); 
    $user_score = 0; 
    for($i=0;$i<10;$i++){ 
     if ($answer_key[$i]==$users_answers[$i]){ 
      $user_score++; 
     } 
    } 
    if ($user_score > $high_score){ 
      $high_score = $user_score; 
      $high_scorer = $r['user']; 
    } 
} 

echo "High scorer is $high_scorer with $high_score points"; 

Answer 2

如果你有得分這樣的答案：

$ answersRating = array（1 => 0,2 => 1,3 => 3，4 => 2，...）選擇答案1時，他得到0分，2 => 1分，3 => 3點等。你可以做這樣的事情：

$score = array_sum(array_intersect_key($answersRating, array_flip(explode(',', $userAnswersStringFromDB)))); 

Answer 3

我想你應該構建您的數據庫是這樣的： 注意：這是最低限度的，你當然會增加額外的字段，如姓名，說明的問題等

answers | id, user_id, question_id, answer 
questions | id, contest_id, correct_answer 
user  | id, name 

然後你可以得到一切與查詢。

最高分：

SELECT u.name,count(*) as Score FROM user u, answers a, questions q WHERE u.id=a.user_id and q.id = a.question_id and q.correct_answer=a.answer WHERE q.contest_id=XXX ORDER BY Score