Hide the PayPal gateway and smart buttons on Checkout page for countries other than ['US', 'CA', 'PR']

functions.php

<?php

// PHP function to unset Stripe gateway
add_filter( 'woocommerce_available_payment_gateways', 'payment_gateway_disable_countries' );
function payment_gateway_disable_countries( $gateways ) {
    if ( is_admin() ) {
      return $gateways;
    }

    if ( ! is_object( WC()->customer ) OR ! method_exists( WC()->customer, 'get_billing_country' ) ) {
      return $gateways;
    }

    $paypal_countries = array('US', 'CA', 'PR');

    if ( is_wc_endpoint_url( 'order-pay' ) ) { // Pay for order page
      $order = wc_get_order( wc_get_order_id_by_order_key( $_GET[ 'key' ] ) );
      $country = $order->get_billing_country();
    } else { // Cart page
      $country = WC()->customer->get_billing_country();
    }

    if ( in_array( $country, $paypal_countries ) && isset( $gateways['stripe'] ) ) {
      unset( $gateways['stripe'] );
    }

    return $gateways;
}

// JavaScript code to hide PayPal gateway based on country
add_action( 'wp_footer', 'payment_gateway_hide_gateways_based_on_country' );
function payment_gateway_hide_gateways_based_on_country() {
    ?>
    <style>
    .hide-gateway {
        display: none !important;
    }
    </style>
    <script>
    (function($) {
        function hidePaymentGateways() {
            var paypalCountries = ['US', 'CA', 'PR'];
            var country = '';

            if (typeof wc_checkout_params !== 'undefined') {
                country = $('select#billing_country').val() || wc_checkout_params.default_country;
            } else if ($('select#calc_shipping_country').length > 0) {
                country = $('select#calc_shipping_country').val();
            } else {
                return;
            }

            if (paypalCountries.indexOf(country) === -1) {
                $('li.payment_method_ppcp-gateway').addClass('hide-gateway');
		$('#ppc-button-ppcp-gateway').addClass('hide-gateway');
            } else {
                $('li.payment_method_ppcp-gateway').removeClass('hide-gateway');
		$('#ppc-button-ppcp-gateway').removeClass('hide-gateway');
            }
        }

        $(document).ready(function() {
            hidePaymentGateways();
            $('body').on('change', 'select#billing_country, select#calc_shipping_country', hidePaymentGateways);
        });

        $(document.body).on('updated_checkout', function() {
            hidePaymentGateways();
        });
    })(jQuery);
    </script>
    <?php
}

THX for your information sir ,sorry because i'm the new user do you know where i can change this code? please help

Hi @fullaineven you can insert this either into the functions.php file when you are using a child theme or use a plugin like Code Snippets to create a snippet that runs on your site.
But please keep in mind this code example above was written for a quite specific user request. So unless you intend to provide the PayPal Checkout gateway only for US, CA, & PR and Stripe for every other country, this code would need some adjustments.

If you need more assistance with this, I suggest reaching out to the support team directly. Thanks!