在 WooCommerce 中将产品添加到购物车之前，根据以前的订单验证电子邮件地址

Question

我使用“PPOM for WooCommerce”插件在单个产品页面上添加了自定义文本字段

这里的目的是让用户输入他的电子邮件地址，然后点击“添加到购物车”按钮

但是在将产品添加到他的卡之前，我想根据电子邮件地址检查现有订单中是否已经出现这种情况

我已经知道如何使用像 woocommerce_add_to_cart_validation 这样的过滤器来完成我想做的事情，但老实说，这就是我的进展

function validate_email( $passed, $product_id, $quantity, $variation_id = '', $variations= '' ) {
    // TODO: Collect all previous orders using the entered email address and check if this already exists in the DB

    wc_add_notice( __( 'E-Mail Address already sold', 'woocommerce' ), 'error' );
    return false;
}
add_filter( 'woocommerce_add_to_cart_validation', 'validate_email', 10, 5 );

如果有人能给我一些如何实现的指导就太好了

Answer 1

我不使用您使用的（付费）插件，所以在我的回答中，我通过自定义代码向单个产品页面添加了一个字段
输入电子邮件地址后，会进行一些验证（不是空的，有效的电子邮件），这可以根据您的需要进一步扩展
如果电子邮件地址有效，将从数据库中读取具有该电子邮件地址的所有先前订单
- wc_get_orders() 用于此，可以使用其他参数进一步扩展，例如某些订单状态等。
如果您要添加到购物车的产品 ID 存在于之前的订单中（带有客户电子邮件），将显示一条错误消息。

所以你得到：

// Add input field to single product page
function action_woocommerce_before_add_to_cart_button() {
    echo '<div class="custom-field-wrapper">';
    echo '<label for="customer-email">Enter your email:</label>';
    echo '<input type="email" id="customer-email" name="customer-email">';
    echo '</div>';
}
add_action( 'woocommerce_before_add_to_cart_button', 'action_woocommerce_before_add_to_cart_button', 10, 0 );

// Validate
function filter_woocommerce_add_to_cart_validation( $passed, $product_id, $quantity, $variation_id = null, $variations = null ) {
    // Isset
    if ( isset ( $_POST['customer-email'] ) ) {
        // Sanitize
        $customer_email = sanitize_text_field( $_POST['customer-email'] );
        
        // Empty
        if ( empty ( $customer_email ) ) {
            wc_add_notice( __( 'Please enter a value into the field', 'woocommerce' ), 'error' );
            $passed = false;
            
        // Verifies that an email is valid.
        // NOT valid
        } elseif ( ! is_email( $customer_email ) ) {
            wc_add_notice( __( 'Invalid email address', 'woocommerce' ), 'error' );
            $passed = false;
        } else {
            // Get orders by email
            $orders_by_customer_email = wc_get_orders( array(
                'customer' => $customer_email,
            ));
            
            // Set flag
            $flag = false;
            
            // This function is an alias of count()
            if ( sizeof( $orders_by_customer_email ) > 0 ) {
                // Iterating through each order
                foreach ( $orders_by_customer_email as $order ) {
                    // Going through order items
                    foreach ( $order->get_items() as $item ) {
                        // Get product ID
                        $product_id_in_order = $item->get_variation_id() > 0 ? $item->get_variation_id() : $item->get_product_id();
                    
                        // Compare
                        if ( $product_id_in_order == $product_id ) {
                            $flag = true;
                            break;
                        }
                    }
                }
            }
            
            // True
            if ( $flag ) {
                wc_add_notice( __( 'You have already purchased this product before', 'woocommerce' ), 'error' );
                $passed = false;
            }
        }
    }
    
    return $passed;
}
add_filter( 'woocommerce_add_to_cart_validation', 'filter_woocommerce_add_to_cart_validation', 10, 5 );

注：如果不是具体针对当前商品ID，而是针对所有之前售出的商品

替换这部分

// This function is an alias of count()
if ( sizeof( $orders_by_customer_email ) > 0 ) {
    // Iterating through each order
    foreach ( $orders_by_customer_email as $order ) {
        // Going through order items
        foreach ( $order->get_items() as $item ) {
            // Get product ID
            $product_id_in_order = $item->get_variation_id() > 0 ? $item->get_variation_id() : $item->get_product_id();
        
            // Compare
            if ( $product_id_in_order == $product_id ) {
                $flag = true;
                break;
            }
        }
    }
}

// True
if ( $flag ) {
    wc_add_notice( __( 'You have already purchased this product before', 'woocommerce' ), 'error' );
    $passed = false;
}

有

// This function is an alias of count()
if ( sizeof( $orders_by_customer_email ) > 0 ) {
    $flag = true;
}

// True
if ( $flag ) {
    wc_add_notice( __( 'You have already purchased something before', 'woocommerce' ), 'error' );
    $passed = false;
}

在 WooCommerce 中将产品添加到购物车之前，根据以前的订单验证电子邮件地址

Validate e-mail address based on previous orders before adding product to cart in WooCommerce

php

wordpress

email-validation

orders

woocommerce