WooCommerce Checkout Hooks

WooCommerce Checkout Hooks — a practical guide to WooCommerce checkout hooks with clear examples you can reuse in real projects.

WooCommerce Plugin Development Series (11/101). Prefer one article? Read the complete WooCommerce plugin development tutorial.

Short description

Classic checkout is hook-rich; block checkout needs Blocks extensibility APIs — support both when possible.

Checkout field filter

add_filter('woocommerce_checkout_fields', function ($fields) {
    $fields['billing']['billing_phone']['required'] = true;
    return $fields;
});