我有一个用于主题wordpress的新闻插件，但是它不起作用，我不是php方面的专家，您能帮我吗？
此错误阻止从站点的内部邮件系统中删除邮件。
通知：未定义的索引：发送者位于第55行的/home/ntfrance/www/wp-content/plugins/disputo-messages/Inc/Core/Messages.php中
<?php namespace BBP_MESSAGES\Inc\Core;
class Messages extends \WP_Messages
{
public $table = 'bbp_messages_2p0';
public $text_domain = 'disputo';
public $settings;
public $transient_expiration;
public function __construct()
{
parent::__construct();
if ( !isset($this->autoload_meta['chat']) ) {
$this->autoload_meta['chat'] = array();
}
$this->autoload_meta['chat'] = array_merge(
$this->autoload_meta['chat'], array('name', 'unsubscribe')
);
$this->transient_expiration = apply_filters('bbpm_cache_transients_expiration', WEEK_IN_SECONDS*2);
$opt = bbpm_options();
if ( $opt['older_delete_days'] && intval($opt['older_delete_days']) ) {
$this->older_messages_cleanup_interval = ($opt['older_delete_days'] * DAY_IN_SECONDS);
}
}
public function filterSet($v, $i=null)
{
switch ( $i ) {
case 'paginate_links_args':
if ( isset($v['base']) && !isset($v['omit_bbpm_custom_base']) ) {
global $wp_rewrite;
if ( $wp_rewrite && $wp_rewrite instanceof \WP_Rewrite )
$v['base'] = str_replace( 99999, '%#%', esc_url( get_pagenum_link(99999) ) );
}
break;
}
return $v;
}
public function prepareChat($chat)
{
if ( is_numeric($chat) || is_string($chat) ) {
$chat = array('chat_id' => $chat);
}
$chat['recipients'] = $this->getChatRecipients($chat['chat_id']);
$chat['avatar'] = $this->getChatAvatar($chat);
$name = $this->getChatName($chat);
$sender = get_userdata($chat['sender']);
if(!empty($sender)) {
$userinfo = get_userdata($chat['sender'])->display_name;
} else {
$userinfo = 'Anonymous';
}
$chat['name'] = $name['name'];
$chat['is_custom_name'] = $name['is_custom_name'];
$chat['sender_name'] = isset($chat['sender']) ? $userinfo : null;
$chat['excerpt'] = isset($chat['message']) ? $this->excerpt($chat['message']) : null;
$chat['classes'] = array();
$chat['unread_count'] = $this->getChatUnreadCount($chat['chat_id']);
if ( isset($chat['sender']) && $this->isUnread($chat['chat_id']) && $this->current_user !== $chat['sender'] ) {
$chat['classes'][] = 'unread';
}
$deletes = (array) $this->get_chat_meta($chat['chat_id'], 'delete_scheduled', null);
if ( in_array($this->current_user, $deletes) ) {
$chat['classes'][] = 'pending-delete';
}
return $chat;
}
public function getChatAvatar($chat)
{
$avatar = null;
if ( isset( $chat['recipients'] ) && count($chat['recipients']) < 3 ) {
foreach ( $chat['recipients'] as $user_id ) {
if ( $user_id !== $this->current_user ) {
$avatar = get_avatar_url($user_id);
}
}
}
return apply_filters('BBP_MESSAGES_getChatAvatar', $avatar, $chat);
}
public function getChatName($chat, $current_user=null)
{
if ( !$current_user ) {
$current_user = $this->current_user;
}
$name = $this->get_chat_meta($chat['chat_id'], 'name', null);
if ( $name && trim($name) ) {
$name = esc_attr(wp_unslash($name));
$is_custom_name = true;
} else if ( isset( $chat['recipients'] ) && count($chat['recipients']) < 3 ) {
foreach ( $chat['recipients'] as $user_id ) {
if ( $user_id !== $current_user ) {
$userinfo = get_userdata($user_id);
if (!empty($userInfo)) {
$name = get_userdata($user_id)->display_name;
} else {
$name = 'Anonymous';
}
}
}
} else {
$name = null;
}
return apply_filters('BBP_MESSAGES_getChatName', array(
'name' => $name,
'is_custom_name' => isset($is_custom_name)
), $chat, $name);
}
public function excerpt($raw)
{
$length = apply_filters('BBP_MESSAGES_chat_excerpt_length', 150);
if ( strlen($raw) > $length ) {
$excerpt = substr($raw, 0, $length) . ' ...';
} else {
$excerpt = $raw;
}
return apply_filters('BBP_MESSAGES_chat_excerpt', $excerpt, $raw, $length);
}
public function canContact($user_id, $current_user=null)
{
if ( !$current_user && $this->current_user ) {
$current_user = $this->current_user;
}
$can = true;
// a current user prop is required
if ( !$current_user ) {
$can = false;
}
// first, check if user is the same as their contact
else if ( $current_user == $user_id ) {
$can = false;
}
return apply_filters('bbpm_can_contact', $can, $user_id, $current_user);
}
public function prepareSearchTerm($wpdbprepare=null, $term=null)
{
if ( !$term && $this->search_term ) {
$term = $this->search_term;
}
if ( $term ) {
$term = str_replace('\\', (
$wpdbprepare ? '\\\\' : '\\\\\\\\'
), wp_slash($term));
}
return $term;
}
public function newMessageNotifySend($id, $chat_id, $sender, $recipients)
{
$m = (object) $this->getMessage($id);
if ( empty($m->id) || empty($m->message) )
return;
global $bbpm_bases;
$blogname = get_bloginfo('name');
$sender = get_userdata($m->sender);
$excerpt = $this->excerpt($m->message);
$custom_name = $this->get_chat_meta($chat_id, 'name', null);
$settings = !empty($bbpm_bases['settings_base']) ? $bbpm_bases['settings_base'] : 'settings';
if ( $custom_name && trim($custom_name) ) {
$custom_name = esc_attr($custom_name);
}
$opt = (object) bbpm_options();
$title = sprintf(
$opt->email_subject,
$blogname,
$custom_name ? $custom_name : $sender->display_name
);
$body = $opt->email_body;
$headers = $opt->html_emails ? array('Content-Type: text/html; charset=' . get_option('blog_charset')) : '';
if ( $opt->html_emails ) {
$body = html_entity_decode($body);
}
$title = apply_filters('bbpm_notification_title', $title, func_get_args());
$body = apply_filters('bbpm_notification_body', $body, func_get_args());
$headers = apply_filters('bbpm_notification_headers', $headers, func_get_args());
foreach ( $recipients as $user_id ) {
$pref = bbpm_can_notify($user_id, $chat_id);
if ( !$pref )
continue;
$deletes = (array) $this->get_chat_meta($chat_id, 'delete_scheduled', null);
if ( in_array($user_id, $deletes) )
continue;
$user = get_userdata($user_id);
if ( empty($user->ID) )
continue;
$_body = sprintf(
$body,
$user->display_name,
$sender->display_name,
$blogname,
$excerpt,
bbpm_messages_url($chat_id, $user->ID),
bbpm_messages_url(sprintf('%s/%s/', $chat_id, $settings), $user->ID)
);
$user->user_email = apply_filters('bbpm_notification_user_email', $user->user_email, $user);
bbpm_mail($user->user_email, $title, $_body, $headers);
}
}
public function setCache($key, $data, $group=null)
{
$key = "WP_Messages_{$this->table}_{$key}";
$opt = bbpm_options();
switch ( $opt['cache_ctx'] ) {
case 'transients':
return Transients::set($data, $this->transient_expiration, $key);
break;
case 'none':
return;
break;
default:
return wp_cache_set($key, $data, $group);
break;
}
}
public function deleteCache($key, $group=null)
{
$key = "WP_Messages_{$this->table}_{$key}";
$opt = bbpm_options();
switch ( $opt['cache_ctx'] ) {
case 'transients':
return Transients::delete($key);
break;
case 'none':
return false;
break;
default:
return wp_cache_delete($key, $group);
break;
}
}
public function getCache($key, $group=null)
{
$key = "WP_Messages_{$this->table}_{$key}";
$opt = bbpm_options();
switch ( $opt['cache_ctx'] ) {
case 'transients':
return Transients::get($key);
break;
case 'none':
return false;
break;
default:
return wp_cache_get($key, $group);
break;
}
}
public function getUserContacts($user_id=null, $limit=10, $map='get_userdata')
{
if ( !$user_id ) {
$user_id = $this->current_user;
}
if ( !$user_id )
return array();
if ( !intval($limit) ) {
$limit = 10;
}
$chats = $this->getUserChatsRaw($user_id);
$contacts = array();
if ( $chats ) {
foreach ( $chats as $chat_id ) {
$found = $this->arrayWithout($this->getChatRecipients($chat_id), $user_id);
if ( $found ) {
foreach ( $found as $uid ) {
if ( !in_array($uid, $contacts) ) {
$contacts[] = $uid;
}
if ( count($contacts) >= $limit )
break;
}
}
if ( count($contacts) >= $limit )
break;
}
}
if ( $contacts && $map && is_callable($map) ) {
$contacts = array_map($map, $contacts);
}
return $contacts;
}
public function getUserChatsRaw($user_id)
{
return apply_filters('bbpm_user_chats_raw', parent::getUserChatsRaw($user_id));
}
}
?>