如何知道将表格数据发布到codeigniter控制器后知道表格值

Question

How to know after post the form data into codeigniter controller to know form values are shown, the data is not showing on the controller

 <script>
                $('#login_form').submit(function (e)
                {
                    e.preventDefault();
                    var uname = $('#uname').val();
                    var upassword = $('#upassword').val();
                    if (uname == "" || upassword == "")
                    {
                        $('#error').show().html('All Fields are required');
                    } 
                    else {
                        $('#error').html("").hide();
                        $.ajax({
                            type: "POST",
                            url: "<?= base_url(); ?>User_controller/success/",
                            data: {uname: uname, upassword: upassword},
                            datatype: 'script'

                        });
                    }
                    }

            </script>

Answer 1

This answer shows how to check that the expected inputs are received. If there is some other kind of check you want to make you'll need to edit your answer and explain.

Because you set the ajax option dataType: 'script', it is assumed you want to return javascript. (Note: you use datatype where it should be dataType - the option name is case sensitive.) The "script" I show below serves only as a place holder.

Test for the presence of your inputs using empty(). If a input->post('item') is not found CI v2+ and CI v3+ returns different data types - FALSE (boolean) and NULL respectively. The empty() function will work for both.

function success()
{
   $name = $this->input->post('uname');
   $password = $this->input->post('upassword'); 

   if( empty($name) || empty($password) )
   {
      echo "var result = 'fail';";
   } 
   else
   {
     echo "your javascript code here";
   }

You might want to trim the fields values either before posting them or within success() just to make sure the user didn't send a string full of space characters.