Which file contains the code for "Add to cart"?

[joecooper]

Just a quick one.

I have a main attribute which chooses which sub-attribute to display via JQuery. But since both sub-attributes are drop downs, they still get submitted on their default option.

I am struggling to find the file which processes the "Add to cart" information to ignore one or the other attribute based on the main attribute.

Thanks.

[lat9]

Based on your description, it sounds like you'll want to add a file to the /extra_cart_actions folder, taking "action" when $_GET['action'] is set to 'add_product'.

You can then interrogate the $_POST['id'] array (that contains the attributes) and take action based on your attribute hierarchy, removing any extraneous attribute values.

[joecooper]

So this will run before any other code is ran? And I'll remove the attrubite information, then the usual "add to cart" option deals with the rest? (with attribute removed). Is this right?

[joecooper]

Ok, so I have tested this, but can't seem to get any data about the attributes.

<?php
if (($_GET['action'] == 'add_product')) {
echo("<table>");
 foreach ($_POST as $key => $value) {
        echo "<tr>";
        echo "<td>";
        echo $key;
        echo "</td>";
        echo "<td>";
        echo $value;
        echo "</td>";
        echo "</tr>";
    }
	echo("</table>");
	die("");
	}
?>

displays:

securityToken f5b7fcaa0fa568ffc53f504d7233f123
id Array
cart_quantity 1
products_id 44

[lat9]

What you said in post#3 is correct; this code will run before the "other" add-to-cart processing.

The $_POST['id'] value is (as printed out) an array; you'll need to cycle through them. One hint, you can initially simply dump the contents of the $_POST variables so you can see what you're dealing with:

error_log (__FILE__ . ': POST variables: ' . print_r ($_POST, true));

That will create a myDEBUG*.log file (in your /logs directory) that has the variable dump.

[joecooper]

Yep managed to do the same with var_dump($_POST['id']); so now I can see the values.

I can then pull the value. but unsure how to modify the value? Although thats more PHP related and I'm sure google has the answer.

Many thanks for your help.