AJAX SyntaxError：JSON.parse：意外字符

Question

I've been trying to find out the issue with this for days. As my data is being sent and retrieved, yet it doesn't post into my div.. Why? I did a test and found that I a SyntaxERROR unexpected character.. And can I find it.. Can I heck.

Can someone look through this and tell me of any mistakes please.

<script>
$(document).ready(function(){
    $("form#mycommentform").submit(function() {

        var streamidcontent = $(this).children("#streamidcontent").val();
        var contents = $(this).children("#contents").val();
        $.ajax({
            type: "POST",
            url: "comment_add.php",
            cache: false,
            dataType: "json",
            data: { streamidcontent: streamidcontent, contents: contents }, 
            success: function(data){  
                $("#containerid").html('<div class="stream_comment_holder" id="comment_holder_'+data['comment_streamitem']+'">\
                <div id="comment_list_'+data['comment_streamitem']+'">\
                <div id="tgy"></div><div class="stream_comment" id="comment_'+data['comment_id']+'" style="margin-top:0px;">\
                <table width=100%><tr><td valign=top width=30px></a><td valign=top align=left>\
                <a href="/profile.php?username='+data['username']+'">'+data['first']+'</a>\
                <div class="commentholder">'+data['first']+'</div><br/>\
                <div id="commentactivitycontainer"></div></div></table></div></div>\
                <div class="form"><form id="mycommentform" method="POST" class="form_statusinput">\
                <input type="hidden"  name="streamidcontent" id="streamidcontent" value="'+data['comment_streamitem']+'">\
                <input type="text" name="contents" id="contents" placeholder="Say something" autocomplete="off">\
                <input type="submit" id="button" value="Feed"></form></div>\
                <div class="stream_comment_holder" style="display:;"><div class="like_name"><b>\
                <a href="profile.php?username='+data['username']+'">You Like This</a>\
                </b></div></div>');
                  alert("SUCCESS!!!");
 },
 error: function (xhr, ajaxOptions, thrownError) {
    alert(xhr.statusText);
    alert(xhr.status);
    alert(thrownError);
 }
 });
        return false
    });
 });
 </script>

REPONSE

INSERT INTO streamdata_comments(comment_poster, comment_streamitem, comment_datetime, comment_content) VALUES (10,4090,UTC_TIMESTAMP(),'fff'){"comment_id":"2016","comment_streamitem":"4090","username":"hazy","id":"10","first":"Lucy","middle":"","last":"Botham"}

PHP PAGE

<?php
session_start();
require"include/rawfeeds_load.php";

if(isset($_POST['streamidcontent'])&isset($_POST['contents'])){
rawfeeds_user_core::add_comment($_POST['streamidcontent'],$_POST['contents']);


$json = array();
$check = "SELECT comment_id, comment_datetime, comment_streamitem, comment_poster FROM streamdata_comments WHERE comment_poster='".$_SESSION['id']."' AND comment_streamitem='".$_POST['streamidcontent']."' ORDER BY comment_datetime DESC";
$check1 = mysqli_query($mysqli,$check);
$resultArr = mysqli_fetch_array($check1);
$json['comment_id'] = $resultArr['comment_id'];
$json['comment_streamitem'] = $resultArr['comment_streamitem'];
mysqli_free_result($check1);

$check = "SELECT * FROM users WHERE id=".$_SESSION['id']."";
$check1 = mysqli_query($mysqli,$check);
$resultArr = mysqli_fetch_array($check1);
$json['username'] = $resultArr['username'];
$json['id'] = $resultArr['id'];
$json['first'] = $resultArr['first'];
$json['middle'] = $resultArr['middle'];
$json['last'] = $resultArr['last'];
mysqli_free_result($check1);

echo json_encode($json);
}
?>

Answer 1

As @thomas stated above. I was echoing the SQL query out into my function. I removed this and its now working perfectly.