CODEWITHSUNDEEP
phpmysqlsqlcomments
Mohammad Ahmad
Mohammad Ahmad

Reputation: 745

Get repliess on in comment system

I'm working on comments system where display post, comments (parent comments), and comments repliess (child comments).

MySql comments table looks like below: 

comment_id int primary_key
post_id int // where i save the post id 
author varchar
comment text
parent_id int // where i save parent comment id in case this comment is reply of another comment

Now, My case is when I go through MySql result set to print comments info. exactly when trying to print child comments (comments of other comments ) and parent comments ( comment of the post ).

My current method to achieve this, is selecting all comments that have no parent_id

SELECT * FROM comments WHERE parent_id = null

And loop over all result using PHP, then make another query inside the loop for each comment searching if there is any child comments of it.

<?php

$sql_result_set;

while($comment = mysql_fetch_array($sql_result_set, MYSQL_ASSOC){
      // process comment info 
      $sql = "SELECT * FROM comments where parent_id = ".$comment['comment_id'];
      $result = mysqli_query($sql);
      if(mysql_num_rows($result)>0){
         while($child_comments = mysql_fetch_array($result, MYSQL_ASSOC)){
               // child comments of the parent
         }
      }
}

?>

Now, My question is "Is there any better way to do the same thing? "

Your help is appreciated

All the best,

Upvotes: 0

Views: 194

Answers (1)

sandip
sandip

Reputation: 3289

Another way is to collect all the value in an array i.e select all parent_id in above case and the use 

WHERE IN(parent_id list)

Upvotes: 1

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