AJAX with JS and PHP, Getting Input Back

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I am trying to use this code but it will not work. It is meant to be used for AJAX with JS and PHP. This is the client code:

HTML

<!DOCTYPE html>
<html>
<head>
<script type="text/javascript">
function ajax()
{
if (window.XMLHttpRequest)
  {// code for IE7+, Firefox, Chrome, Opera, Safari
  xmlhttp=new XMLHttpRequest();
  }
else
  {// code for IE6, IE5
  xmlhttp=new ActiveXObject("Microsoft.XMLHTTP");
  }
xmlhttp.onreadystatechange=function()
  {
  if (xmlhttp.readyState==4 && xmlhttp.status==200)
    {
    document.getElementById("response").innerHTML = xmlhttp.responseText;
    }
  }
var text = document.getElementById("text").value;
xmlhttp.open("GET","server.php?q=" + text, true);
xmlhttp.send();
}
</script>
</head>
<body>

<form>
<input type="text" id="text">
<button  önclick="ajax()">Send</button>
</form>
<p id="response"></p>

</body>
</html>

Server code:

PHP

<?php
$q = $_REQUEST['q'];
echo $q;
?>

I need it to display the text entered in the box when pressing the button using AJAX not any other method. I am going to use this for a live message service. Please help. Thanks.

Posted 19-Oct-13 5:03am

Cameron Jones

Updated 19-Oct-13 5:16am

v2

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M Rayhan · Accepted Answer · 2013-10-19T08:03:00

Change your client code to this

HTML

<html>
<head>
<script type="text/javascript">
function ajax()
{
if (window.XMLHttpRequest)
  {// code for IE7+, Firefox, Chrome, Opera, Safari
  xmlhttp=new XMLHttpRequest();
  }
else
  {// code for IE6, IE5
  xmlhttp=new ActiveXObject("Microsoft.XMLHTTP");
  }
xmlhttp.onreadystatechange=function()
  {
  if (xmlhttp.readyState==4 && xmlhttp.status==200)
    {
    document.getElementById("response").innerHTML = xmlhttp.responseText;
    }
  }
var text = document.getElementById("text").value;
xmlhttp.open("GET","server.php?q=" + text, true);
xmlhttp.send();
return false;
}
</script>
</head>
<body>
 
<form>
<input type="text" id="text">
<button  onclick="return ajax();">Send</button>
</form>
<p id="response"></p>
 
</body>
</html>

In your code i found your "onclick" spelling method using special character. And you should return false from javascript then use that value in your button click event so that it should post back. I changed your code and tested on my local development server and its working fine.