Ajax 从 JS 到 PHP 的 POST 请求无法正常工作

Question

The idea of the code I'm trying to run is this: When a $ _GET [] request arrives on the products.php page, I pass it via an ajax POST request to the get_data_products.php page and get data from there.

PHP

 if(isset($_GET['cat'])){
   $filter_cat = $_GET['cat'];
   
   echo '<input type="hidden" value="'.$filter_cat.'" class="getcat" />';
 }

JS

 function filter_data2() {
     $('.filter_data').html('<div id="loading" style="" ></div>');
     var action = 'fetch_data';
     var filter = [];
     var category = $('.getcat').val();
     filter.push(category);

       $.ajax({
           url:"<?php echo $g['url']; ?>get_date_products.php",
           method:"POST",
           data:{action:action,category:filter},
           success:function(data){
               $('.filter_data').html(data);
           }
       });
 }

The problem is: When I get for example $_GET['category'] = 2 and ajax sends the data to get_data_products.php and then selects another category and $_GET['category'] = 12 sometimes it is not sent. When I give var_dump ( $_GET['category'] ) it always contains the correct value, but for some reason ajax does not send it.

Answer 1

I can see a typo here url:"get_ _products.php" doesn't it supposed to be data?