使用ajax和不使用ajax的Codeigniter-控制器视图

Question

I have a default controller:

class Home extends CI_Controller {

public function index() 
{   
    $data['content']='discover';
    $this->load->view('layouts/master', $data);             
}   

public function categories()
{
    $this->load->view('categories');
}

}

On click, using AJAX i was able to load the view categories.php and update the URL to www.mywebsite.com/categories without refreshing the page.

But now, if the user lands here directly using the link or refreshes the page he ends up loading only the categories.php view and not the master.php view

1. How do i load the master.php and categories.php view on direct URL navigation or page refresh

2. Just load categories.php when using AJAX.

My AJAX:

$('#navbar a').click(function(e){
    e.preventDefault();
    href=$(this).attr('href');
    if (href.indexOf(document.domain) > -1 || href.indexOf(':') === -1){
        window.history.pushState('obj', '', href);
        navigat(href);          
    }       
});

function navigat(href){             
    $.ajax({
        type:'GET',
        url:href,
        cache:false,
        dataType: 'html',
        statusCode: {
                404: function() {
                  $("#content").html('Could not contact server.');
                },
                500: function() {
                  $("#content").html('A server-side error has occurred.');
                }
        },
        error: function() {
            $("#content").html('A problem has occurred.');
        },
        success: function(html) {
            $('#content').html(html);

        }
    });     
};

Thanks!

Answer 1

The CodeIgniter Input Class Provides some helper functions to deal with user inputs , this class is initialized automatically by the system so there is no need to do it manually.

I always recommend to use this class instead using PHP Core Input Variables while dealing with forms and requests.

To check Ajax Request in CodeIgniter, codeIgniter Output Class Method class is_ajax_request() , this function checks to see if the HTTP_X_REQUESTED_WITH server header has been set, if set response will be true otherwise false means it will returns a boolean response.

In you controller you can use below code

if (!$this->input->is_ajax_request()) {
        echo "Not ajax request";
} else {
        echo "Ajax Request";
}

Hence using the above script in your controller action you can identify whether user is coming directly or from ajax call.