PHP/MySQL的 - 使用一個查詢的結果在其他查詢中使用

Question

我有兩個表，一個與職位和另一個註釋：

posts 
----- 
ID 
user_ID 
text 
date 

comments 
-------- 
ID 
post_ID 
user_ID 
text 
date 

我想顯示每一個崗位和每一個崗位，我想要顯示相關評論。所以我做了兩個查詢：

include('bdd.php'); 
$reponse = $bdd->query(' 
    SELECT posts.ID AS post_ID, posts.user_ID, posts.text, posts.date FROM posts 
    ORDER BY posts.ID DESC 
'); 
while ($post = $reponse->fetch()){ 
    //displaying a post 
    $get_comments=$bdd->query('SELECT * FROM comments WHERE post_ID ='.$post['post_ID']); 
    while($comment = $get_comments->fecth()){ 
     //displaying a comment 
     echo $comment['text'] 
    } 
} 

但代碼停止，只顯示沒有評論的第一篇文章。

Answer 1

嘗試之前，首先while插入

$reponse->execute(); 

。您使用的PDO

$get_comments->fecth()檢查fetch()拼寫

Answer 2

是否正確選擇查詢？

SELECT posts.ID AS post_ID, posts.user_ID, posts.text, posts.date 
ORDER BY posts.ID DESC 

它沒有FROM子句。本來應該如下：

SELECT posts.ID AS post_ID, posts.user_ID, posts.text, posts.date FROM posts 
ORDER BY posts.ID DESC