Jump to content

Uncaught TypeError: Cannot set property 'onreadystatechange' of undefined


Recommended Posts

I've been following this tutorial on how to use ajax I have to admit I'm new at it. I could use jquery but I hate it.

I would like to know if someone can help me figure out why my code is reading  Uncaught TypeError: Cannot set property 'onreadystatechange' of undefined. when I fire off the Friend request button or block button. ?

<?php 
error_reporting(E_ALL);
ini_set('display_errors', '1');
include_once('includes/check_login_status.php');?>
<?php
$u = "";
$profile_pic = "";
$profile_pic_btn = "";
$avatar_form = "";
$avatar = "";
$date_added = "";
$joindate = "";
$lastsession = "";

// Make sure the _GET username is set, and sanitize it
if(isset($_GET["u"])){
    $u = preg_replace('#[^a-z0-9_]#i', '', $_GET['u']);
}else {
    header("location: register.php");
    exit();     
}
$notactive = "";
$sql = "SELECT * FROM register WHERE username='$u' AND activated='1' LIMIT 1";
$user_query = mysqli_query($db_conx, $sql);
$numrows = mysqli_num_rows($user_query);
if($numrows < 1){
    $notactive.= " <br/> <span style='color:red;'>That user does not exist or is not yet activated press back</span> <br/>";
}
// Check to see if the viewer is the account owner
$isOwner = "no";
if($u == $log_username && $user_ok == true){
    $isOwner = "yes";
    $profile_pic_btn = '<a href="#" onclick="return false;" onmousedown="toggleElement(\'avatar_form\')">Toggle Avatar Form</a>';
    $avatar_form  = '<form id="avatar_form" enctype="multipart/form-data" method="post" action="php_parsers/photo_system.php">';
    $avatar_form .=   '<h4>Change your avatar</h4>';
    $avatar_form .=   '<input type="file" name="avatar" required>';
    $avatar_form .=   '<p><input type="submit" value="Upload"></p>';
    $avatar_form .= '</form>';
}
// Fetch the user row from the query above
while ($row = mysqli_fetch_array($user_query, MYSQLI_ASSOC)) {
    $profile_id = $row["id"];
    $avatar = $row["avatar"];
    $lastlogin = $row["lastlogin"];
    $date_added = $row["date_added"];
    $joindate = strftime("%b %d, %Y", strtotime($date_added));
    $lastsession = strftime("%b %d, %Y", strtotime($lastlogin));
}
$profile_pic = '<img src="user/'.$u.'/'.$avatar.'" alt="'.$u.'">';
if($avatar == NULL){
    $profile_pic = '<img src="images/765-default-avatar.png" alt="'.$u.'">';
}
?>
<?php
$isFriend = false;
$ownerBlockViewer = false;
$viewerBlockOwner = false;
if($u != $log_username && $user_ok == true){
    $friend_check = "SELECT id FROM friends WHERE user1='$log_username' AND user2='$u' AND accepted='1' OR user1='$u' AND user2='$log_username' AND accepted='1' LIMIT 1";
    if(mysqli_num_rows(mysqli_query($db_conx, $friend_check)) > 0){
        $isFriend = true;
    }
    $block_check1 = "SELECT id FROM blockedusers WHERE blocker='$u' AND blockee='$log_username' LIMIT 1";
    if(mysqli_num_rows(mysqli_query($db_conx, $block_check1)) > 0){
        $ownerBlockViewer = true;
    }
    $block_check2 = "SELECT id FROM blockedusers WHERE blocker='$log_username' AND blockee='$u' LIMIT 1";
    if(mysqli_num_rows(mysqli_query($db_conx, $block_check2)) > 0){
        $viewerBlockOwner = true;
    }
}
?>
<?php 
$friend_button = '<button disabled>Request As Friend</button>';
$block_button = '<button disabled>Block User</button>';
// LOGIC FOR FRIEND BUTTON
if($isFriend == true){
    $friend_button = '<button onclick="friendToggle(\'unfriend\',\''.$u.'\',\'friendBtn\')">Unfriend</button>';
} else if($user_ok == true && $u != $log_username && $ownerBlockViewer == false){
    $friend_button = '<button onclick="friendToggle(\'friend\',\''.$u.'\',\'friendBtn\')">Request As Friend</button>';
}
// LOGIC FOR BLOCK BUTTON
if($viewerBlockOwner == true){
    $block_button = '<button onclick="blockToggle(\'unblock\',\''.$u.'\',\'blockBtn\')">Unblock User</button>';
} else if($user_ok == true && $u != $log_username){
    $block_button = '<button onclick="blockToggle(\'block\',\''.$u.'\',\'blockBtn\')">Block User</button>';
}
?>
<?php
$friendsHTML = '';
$friends_view_all_link = '';
$sql = "SELECT COUNT(id) FROM friends WHERE user1='$u' AND accepted='1' OR user2='$u' AND accepted='1'";
$query = mysqli_query($db_conx, $sql);
$query_count = mysqli_fetch_row($query);
$friend_count = $query_count[0];
if($friend_count < 1){
    $friendsHTML = $u." has no friends yet";
} else {
    $max = 18;
    $all_friends = array();
    $sql = "SELECT user1 FROM friends WHERE user2='$u' AND accepted='1' ORDER BY RAND() LIMIT $max";
    $query = mysqli_query($db_conx, $sql);
    while ($row = mysqli_fetch_array($query, MYSQLI_ASSOC)) {
        array_push($all_friends, $row["user1"]);
    }
    $sql = "SELECT user2 FROM friends WHERE user1='$u' AND accepted='1' ORDER BY RAND() LIMIT $max";
    $query = mysqli_query($db_conx, $sql);
    while ($row = mysqli_fetch_array($query, MYSQLI_ASSOC)) {
        array_push($all_friends, $row["user2"]);
    }
    $friendArrayCount = count($all_friends);
    if($friendArrayCount > $max){
        array_splice($all_friends, $max);
    }
    if($friend_count > $max){
        $friends_view_all_link = '<a href="view_friends.php?u='.$u.'">view all</a>';
    }
    $orLogic = '';
    foreach($all_friends as $key => $user){
            $orLogic .= "username='$user' OR ";
    }
    $orLogic = chop($orLogic, "OR ");
    $sql = "SELECT username, avatar FROM register WHERE $orLogic";
    $query = mysqli_query($db_conx, $sql);
    while($row = mysqli_fetch_array($query, MYSQLI_ASSOC)) {
        $friend_username = $row["username"];
        $friend_avatar = $row["avatar"];
        if($friend_avatar != ""){
            $friend_pic = 'user/'.$friend_username.'/'.$friend_avatar.'';
        } else {
            $friend_pic = 'images/765-default-avatar.png';
        }
        $friendsHTML .= '<a href="index.php?u='.$friend_username.'"><img class="friendpics" src="'.$friend_pic.'" alt="'.$friend_username.'" title="'.$friend_username.'"></a>';
    }
}
?>
<?php
$coverpic = "";
$sql = "SELECT filename FROM photos WHERE user='$u' ORDER BY RAND() LIMIT 1";
$query = mysqli_query($db_conx, $sql);
if(mysqli_num_rows($query) > 0){
    $row = mysqli_fetch_row($query);
    $filename = $row[0];
    $coverpic = '<img src="user/'.$u.'/'.$filename.'" alt="pic">';
}
?>
<!DOCTYPE html>
<html>
<head>
<script type="application/javascript">
function _(x){
    return document.getElementById(x);
}

function ajaxObj (meth, url){
    var x = new XMLHttpRequest();
    x.open(meth, url, true);
    x.setRequestHeader("Content-type", "application/x-www-form-urlendcoded");
}
function ajaxReturn(x){
    if(x.readyState == 4 && x.status == 200){
        return true;
    }
}
function friendToggle(type,user,elem){
    var conf = confirm("Press OK to confirm the '"+type+"' action for user <?php echo $u; ?>.");
    if(conf != true){
        return false;
    }
    _(elem).innerHTML = '<img src="images/bullet-svg-animated.gif" width="50" height="50">';
    var ajax = ajaxObj("POST", "php_parsers/friend_system.php");
    ajax.onreadystatechange = function(){
        if(ajaxReturn(ajax) == true) {
            if(ajax.responseText.trim() == "friend_request_sent"){
                _(elem).innerHTML = 'OK Friend Request Sent';
            } else if(ajax.responseText.trim() == "unfriend_ok"){
                _(elem).innerHTML = '<button onclick="friendToggle(\'friend\',\'<?php echo $u; ?>\',\'friendBtn\')">Request As Friend</button>';
            } else {
                alert(ajax.responseText.trim());
                _(elem).innerHTML = 'Try again later';
            }
        }
}
    ajax.send("type="+type+"&user="+user);
}
function blockToggle(type,blockee,elem){
    var conf = confirm("Press OK to confirm the '"+type+"' action on user <?php echo $u; ?>.");
    if(conf != true){
        return false;
    }
    var elem = document.getElementById(elem);
    elem.innerHTML = '<img src="images/bullet-svg-animated.gif" width="50" height="50">';
    var ajax = ajaxObj("POST", "php_parsers/block_system.php");
    ajax.onreadystatechange = function() {
        if(ajaxReturn(ajax) == true) {
            if(ajax.responseText.trim()  == "blocked_ok"){
                elem.innerHTML = '<button onclick="blockToggle(\'unblock\',\'<?php echo $u; ?>\',\'blockBtn\')">Unblock User</button>';
            } else if(ajax.responseText.trim() == "unblocked_ok"){
                elem.innerHTML = '<button onclick="blockToggle(\'block\',\'<?php echo $u; ?>\',\'blockBtn\')">Block User</button>';
            } else {
                alert(ajax.responseText.trim());
                elem.innerHTML = 'Try again later';
            }
        }
    }
    ajax.send("type="+type+"&blockee="+blockee);
}
</script>
<title><?php echo $u; ?></title>
<link rel="stylesheet" type="text/css" href="css/style.css" />
</head>
<style type="text/css">
div#profile_pic_box{float:right; border:#999 2px solid; width:200px; height:200px; margin:20px 30px 0px 0px; overflow-y:hidden;}
div#profile_pic_box > img{z-index:2000; width:200px;}
div#profile_pic_box > a {
    display: none;
    position:absolute; 
    margin:140px 0px 0px 120px;
    z-index:4000;
    background:#D8F08E;
    border:#81A332 1px solid;
    border-radius:3px;
    padding:5px;
    font-size:12px;
    text-decoration:none;
    color:#60750B;
}
div#profile_pic_box > form{
    display:none;
    position:absolute; 
    z-index:3000;
    padding:10px;
    opacity:.8;
    background:#F0FEC2;
    width:180px;
    height:180px;
}
div#profile_pic_box:hover a {
    display: block;
}
div#photo_showcase{float:right; background:url(css/photo_showcase_bg.jpg) no-repeat; width:136px; height:127px; margin:20px 30px 0px 0px; cursor:pointer;}
div#photo_showcase > img{width:74px; height:74px; margin:37px 0px 0px 9px;}
img.friendpics{border:#000 1px solid; width:40px; height:40px; margin:2px;}
</style>
<style type="text/css">
textarea#statustext{width:982px; height:80px; padding:8px; border:#999 1px solid; font-size:16px;}
div.status_boxes{padding:12px; line-height:1.5em;}
div.status_boxes > div{padding:8px; border:#99C20C 1px solid; background: #F4FDDF;}
div.status_boxes > div > b{font-size:12px;}
div.status_boxes > button{padding:5px; font-size:12px;}
textarea.replytext{width:98%; height:40px; padding:1%; border:#999 1px solid;}
div.reply_boxes{padding:12px; border:#999 1px solid; background:#F5F5F5;}
div.reply_boxes > div > b{font-size:12px;}
</style>
<body>
<div class="header">
    <h2>Home</h2>
    
    <?php include_once('dynamic_header.php');?>
</div>

<div class="content">
<?php if (isset($_SESSION['success'])): ?>
    <div class="error success">
        <h3>
            <?php 
                echo $_SESSION['success'];
                unset($_SESSION['success']);
            ?>
        </h3>
    </div>
    <?php endif ?>
        <p>Welcome <strong><?php echo $u; ?> </strong></p>
        
        <?php echo $notactive ?>
           <div id="profile_pic_box" ><?php echo $profile_pic_btn; ?><?php echo $avatar_form; ?><?php echo $profile_pic; ?></div>
  <div id="photo_showcase" onclick="window.location = 'photos.php?u=<?php echo $u; ?>';" title="view <?php echo $u; ?>'s photo galleries">
 <?php echo $coverpic; ?>
 </div>           
    <br>
     <p>Is the viewer the page owner, logged in and verified? <b><?php echo $isOwner; ?></b></p>
    <p>Join Date: <?php echo $date_added; ?></p>
    <p>Last Session: <?php echo $lastsession; ?></p>
    <br />
    <?php
    $member_list ='';
    if(isset($_GET["u"])){
    $u = preg_replace('#[^a-z]#i','',$_GET['u']);
    $sql = mysqli_query($db_conx,"SELECT * FROM register");
    while($row = mysqli_fetch_array($sql)){
        $u = $row['username'];
        $member_list .=' <a href="user.php?u='.$u.'">'.$u.'</a> ';
        }
        
    }
    ?>
    <?php echo $member_list ?>
    <br />
    <br />
    <hr />
    <p>Friend Button: <span id="friendBtn"><?php echo $friend_button; ?></span> <?php echo $u." has ".$friend_count." friends"; ?> <?php   echo $friends_view_all_link; ?></p>
  <p>Block Button: <span id="blockBtn"><?php echo $block_button; ?></span></p>
  <hr />
  <p><?php echo $friendsHTML; ?></p>
  <hr />
</div>

</body>
</html>

 

Edited by requinix
please use Code <> blocks when posting code
Link to post
Share on other sites

Well thanks hopefully this help any other noob like me fail at ajax this is just an ajax test actually I'm more of a php developer so I'm testing myself in new areas....I know its sloppy right lol 

 

 

Edited by smallc28
Link to post
Share on other sites
This thread is more than a year old.

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Restore formatting

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

×
×
  • Create New...

Important Information

We have placed cookies on your device to help make this website better. You can adjust your cookie settings, otherwise we'll assume you're okay to continue.