Here I am adding an example how you can use this helper.

1. First download this code from github. Then copy the webservice_helper.php and paste it to the "helpers" folder which is located in "application" folder.

2. Open the autoload.php from the "config" folder and add "webservice" as helper

    $autoload['helper'] = array('url','file','webservice'); 

3. Make a table called "user" which have 3 field 'id', 'email', 'password' and add some dummy data into the database

4. Add the following code to the controller

   
   public function signin()
   {
   	$this->load->model('user_model');
   	
   	$email = $this->input->get_post('email');
   	$password = $this->input->get_post('password');
   	
   	if($this->user_model->signin($email, $password))
   		$msg = "successfully login";
   	else
   		$msg = "username and password doesn't match";
   	
   	
   	$output = array(
   						'msg' => $msg
   					);
   	
   	jsonOutput($output);
   }
   

5. Make a model named "user_model" add the following code to the model

   
    function signin()
    {
    	$query = $this->db->get_where('user', array('email' => $email, 'password' => $password));
    	
    	if($query->num_rows() > 0)
    		return true;
    	else
    		return false;
    }