add_action( 'woocommerce_cart_calculate_fees', function() {
// Skip Admin Non AJAX
if( is_admin() && ! defined( 'DOING_AJAX' ) ) {
return;
}
// Get Coupon Code From Query
$coupon_code = isset( $_GET['coupon_code'] )
? sanitize_text_field( $_GET['coupon_code'] ) : '';
// Require Coupon Code And Cart Session
if( ! $coupon_code || empty( WC()->session ) ) {
return;
}
// Maybe Boot Cart Session
if( ! WC()->session->has_session() ) {
WC()->session->set_customer_session_cookie( true );
}
// Apply Coupon Unless Preexists
if( ! WC()->cart->has_discount( $coupon_code ) ) {
WC()->cart->add_discount( $coupon_code );
}
} );Replace coupon form with URL argument
Listens to cart page URL argument for `coupon_code`.
Consider the Replace coupon form with a pop-up link code snippet in conjunction with this one. Also could be combined with code to remove the coupon form in cart and/or remove the coupon banner in checkout.
If you’re looking for advanced functionality related to this code, check out the official extension WooCommerce URL Coupons.
Instructions for Replace coupon form with URL argument
- Log into a staging or locally hosted clone of your site.
- Install and activate Code Snippets plugin.
- WP Admin > Snippets > Add New
- Copy and paste the code from the section above.
- Check to ensure formatting came over properly.
- Customize the code as desired.
- Add a meaningful title.
- Select whether to run on front-end or back-end (or both).
- Click “Save and Activate”.
- Test your site to ensure it works.
- Disable if any problems, or recover.
- Repeat for live environment.
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License
All code snippets are licensed GPLv2 (or later) matching WordPress licensing.
Except when otherwise stated in writing the copyright holders and/or other parties provide the program as-is without warranty of any kind, either expressed or implied, including, but not limited to, the implied warranties of merchantability and fitness for a particular purpose.
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