通过AJAX将变量传递到PHP脚本

Question

I am truing to pass variables to a PHP script using onclick but obviously I am doing something wrong.

So..I have in my main page somewhere:

<img src="myImage.jpg" id="cart_icon"  onclick="addcart('100')">

and the addcart function:

function addcart(id){
    $.ajax({
          url: "add_item.php",
          method: "POST", 
          data: {prod_id : id}
        });
}

The add_item.php looks like this (just a simple example):

if (!isset($_SESSION)) session_start(); 
if (isset($_POST['prod_id'])){$_SESSION['item_id']=$_POST['prod_id'];}else($_SESSION['item_id']='Not Set');

When I check the value of the SESSION['item_id'] I am getting 'Not set' instead of '100' Any thoughts? This is just a simple example. The actual code is more complex. Thanks

Answer 1

Firstly, your AJAX call looks incorrect because the method of the call needs to be defined via type and not method .

Read the documentation of $.ajax .

The correct call should be:

function addcart(id){
    $.ajax({
          url: "add_item.php",
          type: "POST", // notice the change over here
          data: {prod_id : id}
        });
}