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PHP With Ajax

What is Ajax.? Ajax stands for Asynchronous JavaScript and XML. It is used to send and recieve data without page refresh.Examples of applications using AJAX: Google Maps, Gmail, Youtube, and Facebook tabs.



Example of PHP With AJAX

<html>
<head>

<script>

//Browser Support Code
function getvalue()
{
var request;
 
try
{
   // Opera 8.0+, Firefox, Safari
   request = new XMLHttpRequest();
}
catch (e)
{
  // Internet Explorer Browsers
  try
   {
      request = new ActiveXObject("Msxml2.XMLHTTP");
   }
  catch (e) 
   {
      try
      {
        request = new ActiveXObject("Microsoft.XMLHTTP");
      }
      catch (e)
      {
         // Something went wrong
         alert("Your browser broke!");
         return false;
      }
   }
}
 
 request.onreadystatechange = function()
 {
   if(request.readyState == 4)
    {
        document.write(request.responseText);
    }
 }
 
    // Now get the value from user and pass it to
   // server script.
   
   request.open("GET", "getajax.php?name=" + str, true);
   request.send();

}

</script>

</head>
<body>

<form>

First name: <input type="text" onkeyup="gatvalue(this.value)">

</form>

</body>
</html>



/*This is getajax.php file*/

<?php
$val = $_GET['name'];

echo "You Entered ".$val; 
?>
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