使用add_filter自定义WooCommerce通知

Question

我正在尝试自定义WooCommerce通知。这是我要替换的通知：

wc_add_notice( sprintf( __( '%s has been removed from your cart because it can no longer be purchased. Please contact us if you need assistance.', 'woocommerce' ), $_product->get_title() ), 'error' )

基于此有用的答案WooCommerce通知消息，我该如何编辑？，我想到了：

function my_woocommerce_membership_notice( $error ) {
    if ( '%s has been removed from your cart because it can no longer be purchased. Please contact us if you need assistance.' == $error ) {
        $error = '%s has been removed from your cart because you added a membership product. Please complete the membership purchase first.';
    }
    return $error;
}
add_filter( 'woocommerce_add_error', 'my_woocommerce_membership_notice' );

这会导致http500错误，我无法确定为什么。

谢谢！

Answer 1

在互联网中搜索这个问题，似乎很多人都有类似的错误问题试图使用类似的事物……

此错误消息在中设置在中/class-wc-cart.php 在第238行。

查看中的WC 2.6源代码> include/wc-notice-functions.php ，wc_add_notice()正在处理2个变量：$message和$notice_type。

所以在这里 $消息变量我们有：
sprintf( __( '%s has been removed from your cart because it can no longer be purchased. Please contact us if you need assistance.', 'woocommerce' ), $_product->get_title() )
而不是：
'%s has been removed from your cart because it can no longer be purchased. Please contact us if you need assistance.'

%s 是sprintf()使用的字符串变量，由 $_product->get_title() 值代替。但是您不能再在这里使用 %s 。
这可能是您错误问题的原因。而不是'%s has been…尝试'An item has been…。

然后基于此线程，使用条件内的strpos() PHP功能，我毫无保证地编译了此片段：

function my_woocommerce_membership_notice( $message ) {
    if (strpos($message,'has been removed from your cart because it can no longer be purchased') !== false) {
        $message = 'An item has been removed from your cart because you added a membership product. Please complete the membership purchase first.';
    }
    return $message;
}
add_filter( 'woocommerce_add_error', 'my_woocommerce_membership_notice' );