这可以通过过滤wp_mail 函数，检查是否to 设置为管理电子邮件，如果是，请添加其他电子邮件地址，并将参数返回到wp_mail

add_filter( \'wp_mail\', \'my_custom_to_admin_emails\' );

/**
 * Filter WP_Mail Function to Add Multiple Admin Emails
 *
 *
 *
 * @param array $args A compacted array of wp_mail() arguments, including the "to" email,
 *                    subject, message, headers, and attachments values.
 *
 * @return array
 */
function my_custom_to_admin_emails( $args ) {
    // If to isn\'t set (who knows why it wouldn\'t) return args
    if( ! isset($args[\'to\']) || empty($args[\'to\']) ) return $args;

    // If TO is an array of emails, means it\'s probably not an admin email
    if( is_array( $args[\'to\'] ) ) return $args;

    $admin_email = get_option( \'admin_email\' );

    // Check if admin email found in string, as TO could be formatted like \'Administrator <[email protected]>\',
    // and if we specifically check if it\'s just the email, we may miss some admin emails.
    if( strpos( $args[\'to\'], $admin_email ) !== FALSE ){
        // Set the TO array key equal to the existing admin email, plus any additional emails
        //
        // All email addresses supplied to wp_mail() as the $to parameter must comply with RFC 2822. Some valid examples:
        // [email protected]
        // User <[email protected]>
        $args[\'to\'] = array( $args[\'to\'], \'[email protected]\', \'Admin4 <[email protected]>\' );
    }

    return $args;
}

这是我的解决方案，它使用update\\u option\\u*过滤器，我相信这是正确的方法。将其添加到插件或主题函数中。php文件，然后您可以在设置->常规屏幕中安全地放置逗号分隔的管理电子邮件。

add_filter(\'pre_update_option_admin_email\',\'sanitize_multiple_emails\',10,2);

function sanitize_multiple_emails($value,$oldValue)
{
    //if anything is fishy, just trust wp to keep on as it would.
    if(!isset($_POST["admin_email"]))
        return $value;

    $result = "";
    $emails = explode(",",$_POST["admin_email"]);
    foreach($emails as $email)
    {
        $email = trim($email);
        $email = sanitize_email( $email );

        //again, something wrong? let wp keep at it.
        if(!is_email($email))
            return $value;
        $result .= $email.",";

    }

    if(strlen($result == ""))
        return $value;
    $result = substr($result,0,-1);

    return $result;
}