PHP Ajax not working
- by Kostis
I have 3 buttons on my page and depending on which one the user is clickingi want to run through ajax call a delete query in my database. When the user clicks on a button the javascript function seems to work but it doesn't run the query in php script.
The html page:
<?php session_start(); ?>
<!DOCTYPE HTML>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-7">
<script>
function myFunction(name)
{
var r=confirm("Are you sure? This action cannot be undone!");
if (r==true)
{
alert(name); // check if is getting in if statement and confirm the parameter's value
var xmlhttp;
if (str.length==0)
{
document.getElementById("clearMessage").innerHTML="";
return;
}
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("clearMessage").innerHTML= responseText;
}
}
xmlhttp.open("GET","clearDatabase.php?q="+name,true);
xmlhttp.send();
}
else
alert('pff');
}
</script>
</head>
<body>
<div id="wrapper">
<div id="header"></div>
<div id="main">
<?php if (session_is_registered("username")){ ?>
<!--<a href="#">???a????s? pa?a??? µ???µ?t??</a><br />
<a href="#">???a????s? pa?a??? s??ed????</a><br />
<a href="#">???a????s? push notifications</a><br />-->
<input type="button" value="???a????s? pa?a??? µ???µ?t??" onclick="myFunction('messages')" />
<input type="button" value="???a????s? pa?a??? s??ed????" onclick="myFunction('conferences')" />
<input type="button" value="???a????s? push notifications" onclick="myFunction('notifications')" />
<div id="clearMessage"></div>
<?php } else echo "Login first."; ?>
</div>
<div id="footer"></div>
</div>
</body>
</html>
and the php script:
<?php
if (isset($_GET["q"]))
$q=$_GET["q"];
$host = "localhost";
$database = "dbname";
$user = "dbuser";
$pass = "dbpass";
$con = mysql_connect($host,$user,$pass) or die(mysql_error());
mysql_select_db($database,$con) or die(mysql_error());
if ($q=="messages")
$query = "DELETE FROM push_message WHERE time_sent IS NOT NULL";
else if ($q=="conferences")
$query = "DELETE FROM push_message WHERE time_sent IS NOT NULL";
else if ($q=="notifications") {
$query = "DELETE FROM push_friend WHERE time_sent IS NOT NULL";
}
$res = mysql_query($query,$con) or die(mysql_error());
if ($res)
echo "success";
else
echo "failed";
mysql_close($con);
?>
