Free

// =============================================================
// CHANGE PLACE ORDER TEXT
// =============================================================
add_filter('woocommerce_order_button_html', 'change_place_order_button');

function change_place_order_button($button_html){
    $button_html = str_replace('Place order', 'Order Now', $button_html);
    return $button_html;
}

function tax_excluded_price_per_user_role( $value ) {
    if ( current_user_can( 'wholesale_customer' ) ) {
        return 'excl';
    }
    return $value;
}
add_filter( 'pre_option_woocommerce_tax_display_shop', 'tax_excluded_price_per_user_role' );
add_filter( 'pre_option_woocommerce_tax_display_cart', 'tax_excluded_price_per_user_role' );

// =========================================================================
// SHOW PRICE IN EURO
// ========================================================================= 
function show_price_in_euro(){
    global $product;
    
     if( $product->has_child() ) {
        $product->get_id();
        $var_price_huf = $product->get_variation_price( 'min', true );
        $exchange_rate = 360;
        $price_eur = $var_price_huf / $exchange_rate;
        echo '<span class="price euro"><span class="woocommerce-Price-amount amount eur">'.round($price_eur, 1).' €</span></span>';
    }
    else{
        $product->get_id();
        $price_huf = $product->get_price(); 
        $exchange_rate = 360;
        $price_eur = $price_huf / $exchange_rate;
        echo '<span class="price euro"><span class="woocommerce-Price-amount amount eur">'.round($price_eur, 1).' €</span></span>';
    }
}
add_action('woocommerce_after_shop_loop_item', 'show_price_in_euro',-1);

// =========================================================================
// MINIMUM ORDER AMOUNT FOR SPECIFIC SHIPPING METHOD
// =========================================================================
function minimum_order_amount_for_shipping( $rates, $package ) {
   $threshold = 100;
   if ( WC()->cart->subtotal < $threshold ) {
         unset( $rates['flat_rate:2'] );
   } 
   return $rates;
}
add_filter( 'woocommerce_package_rates', 'minimum_order_amount_for_shipping', 10, 2 );

// =========================================================================
// SHOW THE PERCENTAGE VALUE OF DISCOUNT PRODUCTS
// =========================================================================
function woocommerce_custom_sales_price( $price, $regular_price, $sale_price ) {
    global $product;
    if( $product->has_child() ) {
        $var_regular_price = $product->get_variation_regular_price( 'min', true );
        $var_sale_price = $product->get_variation_price( 'min', true );
        
        $percentage = round( ( $var_regular_price - $var_sale_price ) / $var_regular_price * 100 ).'%';
        $percentage_txt = ' ' . __('<span class="sale-percentage"> -', 'woocommerce' , '</span>') . $percentage;
        $price = '<del>' . ( is_numeric( $regular_price ) ? wc_price( $regular_price ) : $regular_price ) . '</del> <ins>' . ( is_numeric( $sale_price ) ? wc_price( $sale_price ) . $percentage_txt : $sale_price . $percentage_txt ) . '</ins>';
        return $price;
    }
    else{
        $percentage = round( ( $regular_price - $sale_price ) / $regular_price * 100 ).'%';
        $percentage_txt = ' ' . __('<span class="sale-percentage"> -', 'woocommerce' , '</span>') . $percentage;
        $price = '<del>' . ( is_numeric( $regular_price ) ? wc_price( $regular_price ) : $regular_price ) . '</del> <ins>' . ( is_numeric( $sale_price ) ? wc_price( $sale_price ) . $percentage_txt : $sale_price . $percentage_txt ) . '</ins>';
        return $price;
    }
}
add_filter( 'woocommerce_format_sale_price', 'woocommerce_custom_sales_price', 10, 3 );

// =========================================================================
// ADD EXTRA FEE BASED ON SHIPPING METHOD
// =========================================================================
add_action( 'woocommerce_cart_calculate_fees','wc_add_surcharge' ); 
function wc_add_surcharge() { 
    
    global $woocommerce; 

    if ( is_admin() && ! defined( 'DOING_AJAX' ) ) 
        
    return;
    
    $chosen_methods = WC()->session->get( 'chosen_shipping_methods' );
          
    $chosen_shipping = $chosen_methods[0];
    
    $fee = 10;

    if ( $chosen_shipping == 'flat_rate:2' ) {
        $woocommerce->cart->add_fee( 'Extra fee: ', $fee, true, 'standard' );  
    }
}

// =========================================================================
// CUSTOM TERMS AND CONDITIONS CHECKBOX IN WOO
// =========================================================================
function add_checkbox_to_woocommerce_checkout() {
    ?>
    <p id="wpgdprc_field" class="form-row wpgdprc-checkbox validate-required">
       <span class="woocommerce-input-wrapper">
        <label class="checkbox">
            <input id="wpgdprc" type="checkbox" value="1" class="input-checkbox" name="wpgdprc" > 
            <span class="gdpr-privacy">I've read and accept the  <a target="_blank" href="/terms-and-conditions/">Terms and Conditions</a></span>
            <abbr class="wpgdprc-required required" title="This field is required">*</abbr>
        </label>
        </span>
      
    </p>
    <?php
}
add_action('woocommerce_checkout_after_terms_and_conditions', 'add_checkbox_to_woocommerce_checkout' );