我正试图从这个插件中remove_filter，作为wordpress refrence
global $my_class;
remove_filter( 'the_content', array($my_class, 'class_filter_function') );
在此代码中，我想删除'add_filter('bp_core_fetch_avatar', array($this, 'set_buddypress_avatar'), 10, 1);' remove_filter，这是一个大问题，什么是$this？我无法全局$this，那么以下代码中的$my_class是什么？
我曾尝试global $BuddyPress_First_Letter_Avatar和global BuddyPress_First_Letter_Avata，
它给了我错误。
<?php
class BuddyPress_First_Letter_Avatar {
// Setup (these values always stay the same):
const BPFLA_IMAGES_PATH = 'images'; // avatars root directory
const BPFLA_GRAVATAR_URL = 'https://secure.gravatar.com/avatar/'; // default url for gravatar - we're using HTTPS to avoid annoying warnings
// Default configuration (this is the default configuration only for the first plugin usage):
const BPFLA_USE_PROFILE_AVATAR = TRUE; // TRUE: if user has his profile avatar, use it; FALSE: use custom avatars or Gravatars
const BPFLA_USE_GRAVATAR = TRUE; // TRUE: if user has Gravatar, use it; FALSE: use custom avatars or user's profile avatar
const BPFLA_AVATAR_SET = 'default'; // directory where avatars are stored
const BPFLA_LETTER_INDEX = 0; // 0: first letter; 1: second letter; -1: last letter, etc.
const BPFLA_IMAGES_FORMAT = 'png'; // file format of the avatars
const BPFLA_ROUND_AVATARS = FALSE; // TRUE: use rounded avatars; FALSE: dont use round avatars
const BPFLA_IMAGE_UNKNOWN = 'mystery'; // file name (without extension) of the avatar used for users with usernames beginning
// with symbol other than one from a-z range
// variables duplicating const values (will be changed in constructor after reading config from DB):
private $use_profile_avatar = self::BPFLA_USE_PROFILE_AVATAR;
private $use_gravatar = self::BPFLA_USE_GRAVATAR;
private $avatar_set = self::BPFLA_AVATAR_SET;
private $letter_index = self::BPFLA_LETTER_INDEX;
private $images_format = self::BPFLA_IMAGES_FORMAT;
private $round_avatars = self::BPFLA_ROUND_AVATARS;
private $image_unknown = self::BPFLA_IMAGE_UNKNOWN;
public function __construct(){
// add Settings link to plugins page:
add_filter('plugin_action_links_' . plugin_basename(__FILE__), array($this, 'bpfla_add_settings_link'));
// add stylesheets/scripts:
add_action('wp_enqueue_scripts', array($this, 'bpfla_add_scripts'));
// add filter to get_avatar:
add_filter('get_avatar', array($this, 'set_comment_avatar'), 10, 5); // this will only be used for anonymous WordPress comments
// add filter to bp_core_fetch_avatar:
add_filter('bp_core_fetch_avatar', array($this, 'set_buddypress_avatar'), 10, 1);
// get plugin configuration from database:
$options = get_option('bpfla_settings');
if (empty($options)){
// no records in DB, use default (const) values to save plugin config:
$settings = array(
'bpfla_use_profile_avatar' => self::BPFLA_USE_PROFILE_AVATAR,
'bpfla_use_gravatar' => self::BPFLA_USE_GRAVATAR,
'bpfla_avatar_set' => self::BPFLA_AVATAR_SET,
'bpfla_letter_index' => self::BPFLA_LETTER_INDEX,
'bpfla_file_format' => self::BPFLA_IMAGES_FORMAT,
'bpfla_round_avatars' => self::BPFLA_ROUND_AVATARS,
'bpfla_unknown_image' => self::BPFLA_IMAGE_UNKNOWN
);
add_option('bpfla_settings', $settings);
} else {
// there are records in DB for our plugin, let's assign them to our variables:
$this->use_profile_avatar = $options['bpfla_use_profile_avatar'];
$this->use_gravatar = $options['bpfla_use_gravatar'];
$this->avatar_set = $options['bpfla_avatar_set'];
$this->letter_index = $options['bpfla_letter_index'];
$this->images_format = $options['bpfla_file_format'];
$this->round_avatars = $options['bpfla_round_avatars'];
$this->image_unknown = $options['bpfla_unknown_image'];
}
}
?>public function set_buddypress_avatar($html_data = ''){
$html_doc = new DOMDocument();
$html_doc->loadHTML($html_data);
$image = $html_doc->getElementsByTagName('img');
foreach($image as $data) {
$original_image = $data->getAttribute('src');
$size = $data->getAttribute('width');
$alt = $data->getAttribute('alt');
if (stripos($alt, 'Profile picture of ') === 0){ // if our alt attribute has "profile picture of" in the beginning...
$name = str_replace('Profile picture of ', '', $alt);
} else if (stripos($alt, 'Profile photo of ') === 0){ // or profile photo of...
$name = str_replace('Profile photo of ', '', $alt);
} else { // if there is some problem - just assign alt to name
$name = $alt;
}
}
// something went wrong, just return what came in function argument:
if (empty($original_image) || empty($size) || empty($name) || empty($alt)){
return $html_data;
}
// if there is no gravatar URL it means that user has set his own profila avatar,
// so we're gonna see if we should be using it;
// if we should, just return the input data and leave the avatar as it was:
if ($this->use_profile_avatar == TRUE){
if (stripos($original_image, 'gravatar.com/avatar') === FALSE){
return $html_data;
}
}
// check whether Gravatar should be used at all:
if ($this->use_gravatar == TRUE){
// gravatar used as default option, now check whether user's gravatar is set:
if ($this->gravatar_exists_uri($original_image)){
// gravatar is set, return input data (nothing changes):
return $html_data;
} else {
// gravatar is not set, proceed to choose custom avatar:
$avatar_output = $this->choose_custom_avatar($name, $size, $alt,$gender);
}
} else {
// gravatar is not used as default option, only custom avatars will be used; proceed to choose custom avatar:
$avatar_output = $this->choose_custom_avatar($name, $size, $alt,$gender);
}
return $avatar_output;
}
答案 0 :(得分：0)
你有没有试过这样的东西
remove_filter( 'the_content', array('BuddyPress_First_Letter_Avatar ', 'class_filter_function') );