Jquery Validation Check Username With Remote

I am using the validation plugin and Laravel 4.2. I try to check the username via ajax, but I can't get it work. The username can always be taken, doesn't matter if exists or not.

Solution 1:

It doesn't look like you are sending the data. Try this. Note the post request. Also I believe the dataFilter method should return 'true'.

Update I just also realized the logic in your php is sending back true if the user exists, therefore the logic in the javascript should be like so:

remote: {
    url: "http://"+location.host+"/validation/checkusername",
    type: "post",
    data: {
        username: function () {
            return $("input[name='username']").val();
        }
    },
    dataFilter: function (data) {
        var json = JSON.parse(data);
        if (json.msg == "true") {
            return"\"" + "That username is taken" + "\"";
        } else {
            return'true';
        }
    }
}