[jQuery] Please Help - While Loop PHP & JSON - Comment List

[jQuery] Please Help - While Loop PHP & JSON - Comment List


I want to display an unordered list of comments from my echoed JSON
result using this jQuery code block:
$("#goComment").click(function(){
bigComment = $("#bigComment").val();
         $.post("i-upComments.php", { //this inserts the comment
into the 'comments' table in the DB
bigComment: bigComment,
u: u,
}, function(data){
//display the list of comments as a unordered list - LI
});
    });
-----------------
Here is my PHP:
<?php
include_once("db.php");
$u = 'Jl6XR';
$sql = "SELECT * FROM bigNest INNER JOIN comments ON comments.u =
bigNest.uid";
$result = mysql_query($sql);
while($array = mysql_fetch_array($result)) {
$bigtitle = $array[bigtitle];
$bigbody = $array[bigbody];
$comments = $array[comments];
}
$val = array("bigtitle" => $bigtitle,
"bigbody" => $bigbody,
     "comments" => $comments,
);
$output = json_encode($val);
echo $output."\n";
?>