使用过滤器

Question

我已经安装了一个WordPress的插件（资料创建），其中包括该指令用于过滤函数替换WordPress的插件功能：

Filter 'wppb_signup_user_notification_filter' to bypass this function or 
replace it with your own notification behavior. 

事实上，我想替换随后用我自己的这个指令的功能它改变了正在发送的电子邮件的文本。原有的功能开始时是这样的：

function wppb_signup_user_notification($user, $user_email, $activation_key, $meta = '') { 
    if (!apply_filters('wppb_signup_user_notification_filter', $user, $user_email, $activation_key, $meta)) 
     return false; 
... 
} 

我复制该功能在我自己的插件，并更名为：

function cvc_signup_user_notification($user, $user_email, $activation_key, $meta = '') { 
...(NOTE: I left out the if(!apply_filters conditional as it caused a server 500 error) 
} 

我现在有这个过程的remove_filter和部分的add_filter难度。我已经试过：

remove_filter( 'wppb_signup_user_notification_filter', 'wppd_signup_user_notification'); 
add_filter( 'wppb_signup_user_notification_filter', 'cvc_signup_user_notification'); 

有了这样的结果：

Warning: Missing argument 2 for cvc_signup_user_notification() in /home/ccarlv5/public_html/homebaseinc/wp-content/plugins/cvc-profile-builder-homebase-emails/index.php on line 306 

Warning: Missing argument 3 for cvc_signup_user_notification() in /home/ccarlv5/public_html/homebaseinc/wp-content/plugins/cvc-profile-builder-homebase-emails/index.php on line 306 

而且这样的尝试：

remove_filter( 'wppb_signup_user_notification_filter', 'wppd_signup_user_notification',$user, $user_email, $activation_key, $meta); 
add_filter( 'wppb_signup_user_notification_filter', 'cvc_signup_user_notification',$user, $user_email, $activation_key, $meta); 

产生以下结果：

Warning: Missing argument 1 for cvc_signup_user_notification() in /home/ccarlv5/public_html/homebaseinc/wp-content/plugins/cvc-profile-builder-homebase-emails/index.php on line 306 
Warning: Missing argument 2 for cvc_signup_user_notification() in /home/ccarlv5/public_html/homebaseinc/wp-content/plugins/cvc-profile-builder-homebase-emails/index.php on line 306 
Warning: Missing argument 3 for cvc_signup_user_notification() in /home/ccarlv5/public_html/homebaseinc/wp-content/plugins/cvc-profile-builder-homebase-emails/index.php on line 306 

我试着加入过滤器没有删除原来的，哪个r在相同的3个错误esults（和原来的功能仍然能够被使用）

有人点我在正确的方向实现我自己的改良电子邮件通知替换原有功能的目标。

任何指导，将不胜感激。 谢谢。

Answer 1

试试这个：我添加add_filter()功能与arguments..i取得了插件文件THX

function my_function_name($user, $user_email, $activation_key, $meta = ''){ 


$wppb_general_settings = get_option('wppb_general_settings'); 
$admin_email = get_site_option('admin_email'); 

if ($admin_email == '') 
    $admin_email = 'support@' . $_SERVER['SERVER_NAME']; 

$from_name = apply_filters ('wppb_signup_user_notification_email_from_field', get_bloginfo('name')); 

$message_headers = apply_filters ('wppb_signup_user_notification_from', "From: \"{$from_name}\" <{$admin_email}>\n" . "Content-Type: text/plain; charset=\"" . get_option('blog_charset') . "\"\n"); 

$registration_page_url = ((isset($wppb_general_settings['activationLandingPage']) && (trim($wppb_general_settings['activationLandingPage']) != '')) ? add_query_arg(array('activation_key' => $activation_key), get_permalink($wppb_general_settings['activationLandingPage'])) : 'not_set');  
if ($registration_page_url == 'not_set'){ 
    global $post; 
    if(!empty($post->ID)) 
     $permalink = get_permalink($post->ID); 
    else 
     $permalink = get_bloginfo('url'); 

    if(!empty($post->post_content)) 
     $post_content = $post->post_content; 
    else 
     $post_content = ''; 

    $registration_page_url = ((strpos($post_content, '[wppb-register') !== false) ? add_query_arg(array('activation_key' => $activation_key), $permalink) : add_query_arg(array('activation_key' => $activation_key), get_bloginfo('url'))); 
} 

$subject = sprintf(__('[%1$s] Activate %2$s', 'profilebuilder'), $from_name, $user); 
$subject = apply_filters('wppb_signup_user_notification_email_subject', $subject, $user_email, $user, $activation_key, $registration_page_url, $meta, $from_name, 'wppb_user_emailc_registr_w_email_confirm_email_subject'); 

$message = sprintf(__("To activate your user, please click the following link:\n\n%s%s%s\n\nAfter you activate it you will receive yet *another email* with your login.", "profilebuilder"), '<a href="'.$registration_page_url.'">', $registration_page_url, '</a>.'); 
$message = apply_filters('wppb_signup_user_notification_email_content', $message, $user_email, $user, $activation_key, $registration_page_url, $meta, $from_name, 'wppb_user_emailc_registr_w_email_confirm_email_content'); 

wppb_mail($user_email, $subject, $message, $from_name, '', $user, '', $user_email, 'register_w_email_confirmation', $registration_page_url, $meta); 

return true; 

} 
add_filter('wppb_signup_user_notification_filter','my_function_name', 10);