Skip to main content

This site requires you to update your browser. Your browsing experience maybe affected by not having the most up to date version.

We're retiring the forums!

The SilverStripe forums have passed their heyday. They'll stick around, but will be read only. We'd encourage you to get involved in the community via the following channels instead:

Customising the CMS /

Moderators: martimiz, Sean, Ed, biapar, Willr, Ingo, swaiba

Simple username input check problem - AJAX

Go to End

2 Posts   819 Views


Community Member, 35 Posts

25 September 2013 at 8:29am

Edited: 25/09/2013 8:34am

Hi, I am trying to make validation of a username field. Checks if exist and if exist, shows "choose another name" via ajax.

But problem is, that no value is passed to variable via Ajax. $_POST['username'] is empty.

So my code in controller:

public function checkuser1(){
		$Params = $this->getURLParams();		
        if($Params['ID'] == '1'){
				if (Director::is_ajax()) {
						$username = $_POST['username']; // Seems that I dont receive any value from input vie ajax

						$username = mysql_real_escape_string($username);
						$check_for_username = mysql_query("SELECT ID FROM Member WHERE UserName='$username'");
							return '1';
							return '0';
				else {
					return Director::redirect(Director::baseURL());


public function checkuser(){
		return $this->checkuser1();


And JS code:

<script type="text/javascript">
                 $(".container .inner .top .right").html("<img src='ajax-loader.gif' /> checking...");
					var username = $("#Form_RegistrationForm_UserName").val();
					var dataString = 'username='+ username;

									if(server_response == '0'){
										$(".container .inner .top .right").html("Username available");
										$(".container .inner .top .right").html("Username already taken");

If anyone knows what is the problem, let me know :) Thanks for any help!


Forum Moderator, 5523 Posts

28 September 2013 at 5:23pm

Try using the web inspector in your web browser, investigate the XHR panel to see what the request is being made (and ensure it contains your post data). I think the jQuery post argument takes an object rather than a string (i.e { 'username': username } rather than username=)