How to Check If the Request Is Made via Ajax in Codeigniter

How do I check if the request is made via AJAX in CodeIgniter?

If you are using a library that sends the X-Requested-With header, then you can do...

if (strtolower(filter_input(INPUT_SERVER, 'HTTP_X_REQUESTED_WITH')) === 'xmlhttprequest') {
   // I'm AJAX!
}

Check for Ajax request in CodeIgniter

You can use $this->input->is_ajax_request() from the input class:

if (!$this->input->is_ajax_request()) {
   exit('No direct script access allowed');
}

Check if AJAX call is success or not in codeigniter

You need to check data is inserted or not in database using affected_rows in model

Model

function insert_truck($data){
$this->db->insert('trucks', $data);
$afftectedRows=$this->db->affected_rows();
if($afftectedRows>0)
{
    return TRUE;
}
else{
    return FALSE;
}

}

YOu need to echo your result in Controller

Controller

function add_truck() {
            $data = array(
                'user_id' => $this->input->post('user_id'),
                'marca' => $this->input->post('marca'),
                'serie' => $this->input->post('serie'),
                'numar' => $this->input->post('numar')
            );
//Transfering data to Model
        $res=$this->trucks_model->insert_truck($data);
        if($res){
        $data['msg'] = 'true';
        }else{
           $data['msg'] = 'false';
        }
         echo json_encode($data);
        }

Ajax

success: function (res) {
        if (res.msg=='true')
        {
            jQuery("div#truck_form").hide();
            jQuery("div#success").show();
        } else {
            jQuery("div#error").show();
        }
    }

How to use ajax in codeigniter 4

Here is the sample code of ajax. (Make sure that you have defined route/controller method for search url)

$.ajax({  
    url:<?php echo base_url('search'); ?>,
    type: 'post',
    dataType:'json',
    data:{query:query},
    success:function(data){
        alert(data);
    }  
});

CI4 Code to get the request data

if ($this->request->isAJAX()) {
    $query = service('request')->getPost('query');
    var_dump($this->request->getPost('query'));
}

Also, make sure to update csrf token on every request if you are not reloading a page on success. Also, you need to return csrf token in method.
So in that case your method will look like -

if ($this->request->isAJAX()) {
        $query = service('request')->getPost('query');
        //var_dump($this->request->getPost('query'));
        return json_encode(['success'=> 'success', 'csrf' => csrf_hash(), 'query ' => $query ]);
    }

So in that case your ajax code will look like -

$.ajax({  
        url:<?php echo base_url('search'); ?>,
        type: 'post',
        dataType:'json',
        data:{query:query},
        success:function(data){
           var result = JSON.parse(data);
            $("input[name='csrf_test_name']").val(result['csrf']);
        }  
    });

Way to tell if a post came from an ajax call in codeigniter?

if (isset($_SERVER['HTTP_X_REQUESTED_WITH']) && ($_SERVER['HTTP_X_REQUESTED_WITH'] == 'XMLHttpRequest')) {}

But since you are using codeigniter, its better to use their input class . See how to do it below.

 if($this->input->is_ajax_request()){
     //Execute Your Code
 }

How to check if the request is an AJAX request with PHP

There is no sure-fire way of knowing that a request was made via Ajax. You can never trust data coming from the client. You could use a couple of different methods but they can be easily overcome by spoofing.

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