Ajax Page With PHP
The AJAX HTML Page
This is the HTML page. It contains a simple HTML form and a link to a JavaScript.
First Name:
<input type=”text” id=”txt1″
onkeyup=”showHint(this.value)”>
Suggestions:
The JavaScript code is listed below.
The AJAX JavaScript
This is the JavaScript code, stored in the file “clienthint.js”:
var xmlHttp
function showHint(str)
{
if (str.length==0)
{
document.getElementById(”txtHint”).innerHTML=”";
return;
}
xmlHttp=GetXmlHttpObject()
if (xmlHttp==null)
{
alert (”Your browser does not support AJAX!”);
return;
}
var url=”tutorialz.php”;
url=url+”?q=”+str;
url=url+”&sid=”+Math.random();
xmlHttp.onreadystatechange=stateChanged;
xmlHttp.open(”GET”,url,true);
xmlHttp.send(null);
}
function stateChanged()
{
if (xmlHttp.readyState==4)
{
document.getElementById(”txtHint”).innerHTML=xmlHttp.responseText;
}
}
function GetXmlHttpObject()
{
var xmlHttp=null;
try
{
// Firefox, Opera 8.0+, Safari
xmlHttp=new XMLHttpRequest();
}
catch (e)
{
// Internet Explorer
try
{
xmlHttp=new ActiveXObject(”Msxml2.XMLHTTP”);
}
catch (e)
{
xmlHttp=new ActiveXObject(”Microsoft.XMLHTTP”);
}
}
return xmlHttp;
}
The AJAX Server Page -PHP
There is no such thing as an AJAX server. AJAX pages can be served by any internet server.
AJAX PHP Example
The code in the “tutorialz.php” page just checks an array of names and returns the corresponding names to the client:
AJAX PHP Example
The code above rewritten in PHP.
Note: Code below is tutorialz.php
PHP Example
< ?php
// Fill up array with names
$a[]="Google";
$a[]="Yahoo";
$a[]="Hotmail";
$a[]="Java";
$a[]="PHP";
$a[]="Asp";
$a[]="Ajax";
$a[]="Javascript";
$a[]="Ruby";
$a[]="Ecllipse";
$a[]="Dreamweaver";
$a[]="Flash";
$a[]="Photoshop";
$a[]="Fireworks";
$a[]="Flex";
$a[]="Balu";
$a[]="Shrijesh";
$a[]="Abilash";
$a[]="Vishnu";
$a[]="Shaneem";
$a[]="Azhar";
$a[]="Sarin";
$a[]="Fazi";
$a[]="Anoop";
$a[]="Sreeraj";
$a[]="Sreejith";
$a[]="Vipin";
$a[]="Binoj";
$a[]="Nithin";
$a[]="Rakku";
//get the q parameter from URL
$q=$_GET["q"];
//lookup all hints from array if length of q>0
if (strlen($q) > 0)
{
$hint=”";
for($i=0; $i
if (strtolower($q)==strtolower(substr($a[$i],0,strlen($q))))
{
if ($hint=="")
{
$hint=$a[$i];
}
else
{
$hint=$hint." , ".$a[$i];
}
}
}
}
// Set output to "no suggestion" if no hint were found
// or to the correct values
if ($hint == "")
{
$response="no suggestion";
}
else
{
$response=$hint;
}
//output the response
echo $response;
?>
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