FunnelKit PayPal + WooCommerce PayPal Payments sdk conflict

FunnelKit PayPal + WooCommerce PayPal Payments sdk conflict

/**
 * Plugin Name: FunnelKit PayPal + WooCommerce PayPal Payments — single SDK
 * Description: Optional fix when both plugins load PayPal JS SDK: removes the duplicate sdk/js tag and rewires FunnelKit script deps to PPCP’s loader. 
 *
 * PayPal allows one https://www.paypal.com/sdk/js include per page. Two tags break window.paypal
 * (e.g. PPCP: "getFundingSources is not a function").
 *
 * @package FunnelKit_PayPal_PPCP_Compat
 */

defined( 'ABSPATH' ) || exit;

/**
 * Priority after WooCommerce PayPal Payments (10) and typical FunnelKit enqueue (10).
 */
add_action(
	'wp_enqueue_scripts',
	static function () {
		if ( ! class_exists( '\WooCommerce\PayPalCommerce\PluginModule', false ) ) {
			return;
		}

		$ppcp_loader = null;
		if ( wp_script_is( 'ppcp-smart-button', 'enqueued' ) ) {
			$ppcp_loader = 'ppcp-smart-button';
		} elseif ( wp_script_is( 'ppcp-add-payment-method', 'enqueued' ) ) {
			$ppcp_loader = 'ppcp-add-payment-method';
		}

		if ( ! $ppcp_loader ) {
			// PPCP not loading on this screen — keep FunnelKit SDK only.
			return;
		}

		$funnelkit_handles = array( 'fkwcppcp-gateway', 'fkwcppcp-express-button', 'fkwcppcp-add-payment-method' );
		$needs_patch       = false;
		foreach ( $funnelkit_handles as $handle ) {
			if ( wp_script_is( $handle, 'enqueued' ) ) {
				$needs_patch = true;
				break;
			}
		}
		if ( ! $needs_patch ) {
			return;
		}

		wp_dequeue_script( 'funnelkit-paypal-sdk' );
		wp_deregister_script( 'funnelkit-paypal-sdk' );

		$wp_scripts = wp_scripts();
		if ( ! $wp_scripts instanceof WP_Scripts ) {
			return;
		}

		foreach ( $funnelkit_handles as $handle ) {
			if ( ! isset( $wp_scripts->registered[ $handle ] ) ) {
				continue;
			}
			$obj  = $wp_scripts->registered[ $handle ];
			$deps = is_array( $obj->deps ) ? $obj->deps : array();
			$deps      = array_diff( $deps, array( 'funnelkit-paypal-sdk' ) );
			$deps[]    = $ppcp_loader;
			$deps      = array_values( array_unique( $deps ) );
			$obj->deps = $deps;
		}
	},
	100
);