Meta Pixel – InitiateCheckout Event

// Track InitiateCheckout event on checkout page

add_action( 'wp_footer', 'voelgoed_meta_pixel_initiate_checkout', 20 );

function voelgoed_meta_pixel_initiate_checkout() {

    // Safety: don’t run in admin or during AJAX calls

    if ( is_admin() || wp_doing_ajax() ) {

        return;

    }

    // Must be checkout page

    if ( ! function_exists( 'is_checkout' ) || ! is_checkout() ) {

        return;

    }

    // Don’t fire on thank you page

    if ( function_exists( 'is_order_received_page' ) && is_order_received_page() ) {

        return;

    }

    // Must have Woo + cart

    if ( ! function_exists( 'WC' ) || ! WC()->cart || WC()->cart->is_empty() ) {

        return;

    }

    $cart = WC()->cart;

    // Build content_ids (use variation_id when present)

    $content_ids = [];

    foreach ( $cart->get_cart() as $cart_item ) {

        $id = ! empty( $cart_item['variation_id'] ) ? (int) $cart_item['variation_id'] : (int) $cart_item['product_id'];

        if ( $id ) {

            $content_ids[] = (string) $id;

        }

    }

    $content_ids = array_values( array_unique( $content_ids ) );

    // Force numeric value for JS

    $value    = (float) $cart->get_total( 'edit' );

    $currency = function_exists( 'get_woocommerce_currency' ) ? get_woocommerce_currency() : 'ZAR';

    $num_items = (int) $cart->get_cart_contents_count();

    ?>

    <script>

    (function () {

        // Prevent "fbq is not defined" console errors

        if (typeof fbq !== 'function') return;

        fbq('track', 'InitiateCheckout', {

            content_ids: <?php echo wp_json_encode( $content_ids ); ?>,

            content_type: 'product',

            value: <?php echo wp_json_encode( $value ); ?>,

            currency: <?php echo wp_json_encode( $currency ); ?>,

            num_items: <?php echo (int) $num_items; ?>

        });

    })();

    </script>

    <?php

}