if (xmlhttp.readyState == 4 && xmlhttp.status == 200) this condition is not working

Question

Actually I am working on a chatbox....But It doesn't meet this condition. Here is the code

function submitChat() {
  if (form1.users.value == "" || form1.messege.value == "") {
    alert("Please fill the all feild");
    return;
  }
  var users = form1.users.value;
  var messege = form1.messege.value;
  var xmlhttp = new XMLHttpRequest();
  xmlhttp.onreadystatechange = function() {
    //Here is the problem may be
    if (xmlhttp.readyState == 4 && xmlhttp.status == 200) {
      document.getElementByID('shouts').innerHTML = xmlhttp.responseText;
    }
  }
  xmlhttp.open('GET', 'process.php?users' + users + '&messege' + messege, 'true');
  xmlhttp.send();

Here these variable shows undefined..

$users = $_REQUEST['users'];
$messege =  $_REQUEST['messege'];

Check this link https://stackoverflow.com/questions/5004233/jquery-ajax-post-example-with-php — nikunjM, Nov 03 '17 at 20:19
Your query string is malformed, names and values need to be separated by a `=` character — Patrick Evans, Nov 03 '17 at 20:19
`console.log(xmlhttp);` before your if, see what those properties are set to — aynber, Nov 03 '17 at 20:20

score 1 · Answer 1 · answered Nov 03 '17 at 20:22

1

You've left out the = between the parameter names and their values.

Also, when you're sending a URL parameter that could include special characters, you need to encode it properly, using encodeURIComponent()

xmlhttp.open('GET', 'process.php?users=' + encodeURIComponent(users) + '&messege=' + encodeURIComponent(messege), true);

Note also that the third argument should be a boolean, not a string (although since any non-empty string is truthy, 'true' will have the same effect as true, but 'false' would not be equivalent to false).

It's also not usually a good idea to use a URL parameter for long inputs like messages, you should use POST data instead.

xmlhttp.open('POST', 'process.php', true);
xmlhttp.send('users=' + encodeURIComponent(users) + '&messege=' + encodeURIComponent(messege));

answered Nov 03 '17 at 20:22

Barmar

741,623
53
500
612

if (xmlhttp.readyState == 4 && xmlhttp.status == 200) { document.getElementByID('shouts').innerHTML = xmlhttp.responseText; } – Rakib Nov 03 '17 at 20:36
Still now It doesn;t meet this condition ...Is there any problem here? – Rakib Nov 03 '17 at 20:36
Check the Network tab of Developer Tools to see if there's an error from the AJAX request. – Barmar Nov 03 '17 at 20:37
2(index):28 Uncaught TypeError: document.getElementByID is not a function at XMLHttpRequest.xmlhttp.onreadystatechange ((index):28) – Rakib Nov 03 '17 at 20:39
`ByID` should be `ById`. – Barmar Nov 03 '17 at 20:40
include 'database.php'; $users = $_REQUEST['users']; $messege = $_REQUEST['messege']; $query1= mysqli_query("INSERT INTO souts('users','messege') VALUES('$users','$messege')"); $result1 = mysqli_query("SELECT * FROM souts"); while ($extract= mysqli_fetch_array($result1)) { echo $extract['users'] . " :" . $extract['messege'] . ""; } – Rakib Nov 03 '17 at 20:43
Don't try to put long code in comments. Edit the question – Barmar Nov 03 '17 at 20:44
Check the Network tab of Developer Tools to see what parameters you're sending. – Barmar Nov 03 '17 at 20:45
The code is not interesting. `$_REQUEST` is set automatically. – Barmar Nov 03 '17 at 20:46
Doesn't shows anything error or parameters in Network tab..Bro – Rakib Nov 03 '17 at 20:52
When you set a breakpoint before `xmlhttp.send`, do you see the correct values in `users` and `messege`? – Barmar Nov 03 '17 at 20:54
Yeah I get the value of user and messege brfore xmlhttp.send – Rakib Nov 03 '17 at 20:57
Check the `request_order` setting in `php.ini` to make sure it's filling in this variable. See http://php.net/manual/en/ini.core.php#ini.request-order – Barmar Nov 03 '17 at 21:05
What does `var_dump($_REQUEST, $_POST, $_GET);` show? – Barmar Nov 03 '17 at 21:06
Shows array(0) { } – Rakib Nov 03 '17 at 21:18
I am sure that this code is not working $users = $_REQUEST['users']; – Rakib Nov 03 '17 at 21:20
Are you using `POST` or `GET`? – Barmar Nov 03 '17 at 21:21
I am Using POST – Rakib Nov 03 '17 at 21:24
Do other PHP scripts on your server get their parameters properly? – Barmar Nov 03 '17 at 21:25
Yeah ..working only users and messege is in the problem – Rakib Nov 03 '17 at 21:28

if (xmlhttp.readyState == 4 && xmlhttp.status == 200) this condition is not working

1 Answers1