getting undefined after the ajax call

[zoreli]

Hi

I am trying to build Ajax & Codeigniter login form. My first objective is if the user enter wrong username or password, to inform him with jquery, without relaoding the page. But after the ajax call, I am getting undefined in the console instead of my error message. Here is the code from the JavaScript (jQuery)

formLogin.on('submit', function(e,errorMessage){
               
           $.ajax({
            type: 'POST',
            url: 'loginCheck',
            data: $(formLogin).serialize(),
            dataType: 'json',
            success: function(){ 
                console.log('my message ' + errorMessage);
                
                }
            });
     
              e.preventDefault();
       });

And here is the code from the Codeigniter controller.

if .....
// the code that checks for the username and password against the database and user is found....

else {   
// user is not found, so populate the error message....

                    $errorMessage = "Wrong Username or Password";               
                     echo json_encode($errorMessage);
                     
               // $this->cms($errorMessage);
               
            } 

In the console log, I am getting the following message:

my message undefined.

Any help will be deeply appreciated.

Regards, zoreli

[chris.upjohn]

The problem is where you placed your errorMessage argument:

formLogin.on('submit', function(e,errorMessage){

Whenever you use the $.ajax method all return arguments need to be part of the success(), error() or complete() methods as they are what return the strings from your PHP source, see the below:

formLogin.on('submit', function(e) {
    e.preventDefault();
 
    $.ajax({
        type : 'POST',
        url : 'loginCheck',
        data : $(formLogin).serialize(),
        dataType : 'json',
        success : function(errorMessage) { 
            console.log('my message ' + errorMessage);
        }
    });
});

[zoreli]

Hi Chris

Thanks for your help, that did the trick.

Regards, zoreli