I have this function being called when a user clicks on a logout link, but i'm unsure if i can kill the current session by calling session_destory(); from JS?? - function logout() {
-
//kill session here ex. session_destory();
-
}
18  5591  gits 5,390
Expert Mod 4TB
you may use an ajax-call to call a php-script that does what you want ...
kind regards
Any easy tutorials on AJAX you'd recommend, never used i before??
gits 5,390
Expert Mod 4TB here you will find a simple example and some explaination
kind regards
Ok, I've got this far now, I'm not sure how to set it so it works on a click of a link? - <script type="text/javascript">
-
function logout()
-
{
-
var xmlHttp;
-
try
-
{
-
// Firefox, Opera 8.0+, Safari
-
xmlHttp=new XMLHttpRequest();
-
}
-
catch (e)
-
{
-
// Internet Explorer
-
try
-
{
-
xmlHttp=new ActiveXObject("Msxml2.XMLHTTP");
-
}
-
catch (e)
-
{
-
try
-
{
-
xmlHttp=new ActiveXObject("Microsoft.XMLHTTP");
-
}
-
catch (e)
-
{
-
alert("Your browser does not support AJAX!");
-
return false;
-
}
-
}
-
}
-
xmlHttp.onreadystatechange=function()
-
{
-
if(xmlHttp.readyState==4)
-
{
-
document.logout.value=xmlHttp.responseText;
-
}
-
}
-
xmlHttp.open("GET","logout.php",true);
-
xmlHttp.send(null);
-
}
-
</script>
- <a href="#" name="logout" onclick="logout(); return false;">Logout</a>
gits 5,390
Expert Mod 4TB
doesn't it work ... from a first quick look it should do?
kind regards
I've gone over all the code and i've put a pop up message in the logout.php file but it's not showing the pop up when i click logout so it's never getting to the logout.php file?
gits 5,390
Expert Mod 4TB
the logout.php is called async ... and you will just get a notification in the onreadystatechange-handler of the request, so just echo something in the php-script and alert the responseText, to see that the script is called ...
I tried this but nothing: - ...
-
xmlHttp.onreadystatechange=function()
-
{
-
if(xmlHttp.readyState==4)
-
{
-
document.logout.value=xmlHttp.responseText;
-
alert(xmlHttp.responseText);
-
}
-
}
-
...
gits 5,390
Expert Mod 4TB
try the following please: - xmlHttp.onreadystatechange = function() {
-
if (xmlHttp.readyState == 4) {
-
alert(xmlHttp.responseText);
-
}
-
}
-
gits 5,390
Expert Mod 4TB
simplified example for firefox: - <html>
-
<script type="text/javascript">
-
function logout() {
-
var xmlHttp;
-
-
xmlHttp = new XMLHttpRequest;
-
-
xmlHttp.onreadystatechange = function() {
-
if (xmlHttp.readyState == 4) {
-
alert(xmlHttp.responseText);
-
}
-
}
-
-
xmlHttp.open("GET", "foo.php", true);
-
xmlHttp.send(null);
-
}
-
</script>
-
<body>
-
<a href="#" onclick="logout(); return false;">foo</a>
-
</body>
-
</html>
-
and foo.php should just echo/print something. then you should get the printed text in the alert box. do you get any errors?
@gits
This worked! How do i get it to work without the alert box?
gits 5,390
Expert Mod 4TB
yes ... the php-script is called and executed ... and you should know whether it does what it should ... in case you wrote it for yourself? ;)
kind regards
Ah yes, it's working now in firefox but not in IE??
gits 5,390
Expert Mod 4TB
in case you use your above shown code tho create an instance of the XMLHttpRequest-object it should work. do you get any errors?
I got it working in IE was something to do with the cache in IE so it was working the whole time.
One last question, how would you go about adding a redirect on the successful click of logout, would you add it in the JS or the logout.php file?
Thanks again for all your help.
gits 5,390
Expert Mod 4TB
you may use: - window.location.href = 'whatever_url';
in the onreadystatechange-handler in the JavaScript-code. where the url might be the responseText in case you need that.
kind regards
Works perfectly, thanks again!
gits 5,390
Expert Mod 4TB
no problem ... ;) ... you are welcome. post back to the forum anytime you have more questions ...
kind regards
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