PHP / MySQL - 使用查询结果在另一个查询中使用

Question

I have two tables, one with posts and another one with comments:

posts
-----
ID
user_ID
text
date

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

I want to display every post and for each post, I want to display the related comments. So I made two queries:

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']
    }
}

But the code stops and only displays the first post without the comments.

Answer 1

Try to insert

 $reponse->execute();

before first while . OR replace $bdd->prepare(); with $bdd->query();

Typo error:

$get_comments->fecth() check your fetch() spelling

Answer 2

is the select query even correct??

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

It has no FROM clause. Should have been as below:

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