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POusing two mySQL queries to create nested JSON array
 

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    <p>I am trying to create a nested JSON array with the results of the second query being attached to the rows of the first.</p> <p>My code so far is as follows:-</p> <pre><code>$output = array(); $sql = "select cp_comments.*,users.user_login from ".$wpdb-&gt;prefix."cp_comments cp_comments left join ".$wpdb-&gt;prefix."users users on users.ID=cp_comments.uid where songid='$id' order by cp_comments.id asc"; $comments = $wpdb-&gt;get_results($sql); foreach($comments as $c){ $sql = "select cp_replies.*,users.user_login from ".$wpdb-&gt;prefix."cp_replies cp_replies left join ".$wpdb-&gt;prefix."users users on users.ID=cp_replies.uid where cp_replies.cid='".$c-&gt;id."' order by cp_replies.id asc"; $replies = $wpdb-&gt;get_results($sql); $output['comment-'.$c-&gt;id] = $c; if($replies){ foreach($replies as $r){ // The line below causes the problem //$output['comment-'.$c-&gt;id][] = $r; } } } echo json_encode( $output ); </code></pre> <p>As you can see what I am attempting to do is retrieve the results of query-1, lop through them and populate an array. So far so good. Then for each row in the resultset, perform a second query, using $c->id as a variable to dynamically change the second query dependant upon the id, then nest this data within each returned row of the first query.</p> <p>The line I have commented out causes an error:-</p> <pre><code>Fatal error: Cannot use object of type stdClass as array in </code></pre> <p>Although I have a rough understanding of why this error is happening, I do not know how to fix it and when I have tried a standard multidimensional array using while loops etc, I was then not able to access the $c->$id variable making the whole second query worthless.</p> <p>Essentially I would like the data returned in this format:-</p> <pre><code>{ "comment-2" : [ { "avatar" : "http://www.songbanc.com/wp-content/uploads/avatars/1/8bb11e958a26913e2c13393014e854d5-bpthumb.jpg", "body" : "More tests....", "display_name" : "admin", "id" : "26", "playtime" : 36.206896551699998, "posttime" : "2011-10-08 11:11:55", "cid" : "26", "songid" : "30", "uid" : "1", "user_login" : "admin", "user_url" : "http://www.songbanc.com/members/admin/" "cid": "1", "replies" : [ { "cid" : "26", "body" : "test reply", "posttime" : "2011-10-08 11:11:55" }] }, </code></pre> <p>It is currently 2 dimensional however without the 'replies'.</p>
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