PHP add_filter函数代码示例

 function __construct()
 {
     add_action('in_widget_form', array(&$this, 'extend_recent_posts_form'), 10, 3);
     add_filter('widget_update_callback', array(&$this, 'extend_recent_posts_update'), 10, 4);
     add_filter('widget_title', array(&$this, 'extend_recent_posts_init_query_filter'), 10, 3);
     add_filter('widget_posts_args', array(&$this, 'extend_recent_posts_query'));
 }

 function __construct()
 {
     parent::__construct();
     epl_log('init', get_class() . "  initialized", 1);
     $this->epl->load_config('global-discount-fields');
     $this->ecm = $this->epl->load_model('epl-common-model');
     global $epl_fields;
     $this->fields = $epl_fields;
     //$this->epl_fields = $this->epl_util->combine_array_keys( $this->fields );
     $this->epl_fields = $epl_fields;
     $post_ID = '';
     if (isset($_GET['post'])) {
         $post_ID = $_GET['post'];
     } elseif (isset($_POST['post_ID'])) {
         $post_ID = $_POST['post_ID'];
     }
     $this->data['values'] = $this->ecm->get_post_meta_all((int) $post_ID, false, true);
     $this->edit_mode = epl_get_element('post', $_GET) || epl_get_element('post_ID', $_REQUEST);
     if (isset($_REQUEST['epl_ajax']) && $_REQUEST['epl_ajax'] == 1) {
         $this->run();
     } else {
         add_action('default_title', array($this, 'pre'));
         add_action('add_meta_boxes', array($this, 'epl_add_meta_boxes'));
         add_action('save_post', array($this, 'save_postdata'));
         add_filter('manage_edit-' . self::post_type . '_columns', array($this, 'add_new_columns'));
         add_action('manage_' . self::post_type . '_posts_custom_column', array($this, 'column_data'), 10, 2);
     }
 }

 /**
  * Constrcut the plugin
  */
 public function __construct()
 {
     add_filter('is_active_sidebar', array($this, 'activateSidebars'));
     add_action('dynamic_sidebar_before', array($this, 'before'));
     add_action('dynamic_sidebar_after', array($this, 'after'));
     add_action('wp_enqueue_scripts', array($this, 'assets'));
 }

 function init()
 {
     $args = array('labels' => $this->create_labels(), 'description' => '', 'public' => true, 'publicly_queryable' => true, 'show_ui' => true, 'capability_type' => 'post', 'has_archive' => true, 'hierarchical' => false, 'show_in_menu' => true, 'menu_position' => 50, 'supports' => array('title', 'editor', 'author', 'thumbnail', 'excerpt'), 'register_meta_box_cb' => array($this, 'metaboxes'), 'rewrite' => array('slug' => strtolower($this->single), 'with_front' => false, 'feeds' => true, 'pages' => true), 'can_export' => true, 'show_in_nav_menus' => true);
     $args = array_merge($args, $this->overwrite);
     register_post_type($this->name, $args);
     add_filter('post_updated_messages', array($this, 'post_updated_messages'));
 }

 public function public_init()
 {
     add_filter("previous_post_link", array(&$this, "linkFilter"));
     add_filter("next_post_link", array(&$this, "linkFilter"));
     add_shortcode('club_event', array(&$this, 'eventShortCode'));
     $this->urlHandler();
 }

 function __construct()
 {
     // global
     global $sitepress;
     // vars
     $this->lang = ICL_LANGUAGE_CODE;
     // update settings
     acf_update_setting('default_language', $sitepress->get_default_language());
     acf_update_setting('current_language', $this->lang);
     // actions
     add_action('acf/verify_ajax', array($this, 'verify_ajax'));
     add_action('acf/field_group/admin_head', array($this, 'admin_head'));
     add_action('acf/input/admin_head', array($this, 'admin_head'));
     // bail early if not transaltable
     if (!$this->is_translatable()) {
         return;
     }
     // actions
     add_action('acf/upgrade_start/5.0.0', array($this, 'upgrade_start_5'));
     add_action('acf/upgrade_finish/5.0.0', array($this, 'upgrade_finish_5'));
     add_action('acf/update_field_group', array($this, 'update_field_group'), 2, 1);
     add_action('icl_make_duplicate', array($this, 'icl_make_duplicate'), 10, 4);
     // filters
     add_filter('acf/settings/save_json', array($this, 'settings_save_json'));
     add_filter('acf/settings/load_json', array($this, 'settings_load_json'));
 }

function Destro_setup()
{
    // This theme uses wp_nav_menu() in one location.
    register_nav_menus(array('mainmenu' => __('Main Navigation', 'Destro')));
    // This theme uses post thumbnails
    add_theme_support('post-thumbnails');
    add_image_size('Destrothumb', 450, 300, true);
    // Add default posts and comments RSS feed links to head
    add_theme_support('automatic-feed-links');
    // Add translation support
    load_theme_textdomain('Destro', get_template_directory() . '/languages');
    // Delete default WordPress gallery css
    add_filter('use_default_gallery_style', '__return_false');
    // Add Custom background feature
    if (of_get_option('skin_style')) {
        $custombgargsskin = of_get_option('skin_style');
    } else {
        $custombgargsskin = 'destro';
    }
    if (get_stylesheet_directory() == get_template_directory()) {
        $custombgargs = array('default-color' => '292929', 'default-image' => get_template_directory_uri() . '/images/' . $custombgargsskin . '/page_bg.png');
    } else {
        $custombgargs = array('default-image' => get_stylesheet_directory_uri() . '/images/page_bg.png');
    }
    add_theme_support('custom-background', $custombgargs);
}

 function __construct()
 {
     add_filter('manage_edit-team_columns', array($this, 'arrange_team_columns'));
     add_action('manage_team_posts_custom_column', array($this, 'manage_team_columns'), 10, 2);
     // add_action( 'restrict_manage_posts', array( $this, 'add_taxonomy_filters' ) );
     add_filter("manage_edit-team_sortable_columns", array($this, 'team_column_sort'));
 }

 public static function init()
 {
     if (!is_admin()) {
         return;
     }
     if (!isset($_FILES['podlove_import_tracking'])) {
         return;
     }
     set_time_limit(10 * MINUTE_IN_SECONDS);
     // allow xml+gz uploads
     add_filter('upload_mimes', function ($mimes) {
         return array_merge($mimes, array('xml' => 'application/xml', 'gz|gzip' => 'application/x-gzip'));
     });
     require_once ABSPATH . '/wp-admin/includes/file.php';
     $file = wp_handle_upload($_FILES['podlove_import_tracking'], array('test_form' => false));
     if ($file && (!isset($file['error']) || !$file['error'])) {
         update_option('podlove_import_tracking_file', $file['file']);
         if (!($file = get_option('podlove_import_tracking_file'))) {
             return;
         }
         $importer = new \Podlove\Modules\ImportExport\Import\TrackingImporter($file);
         $importer->import();
     } else {
         echo '<div class="error"><p>' . $file['error'] . '</p></div>';
     }
 }

 public function __construct($main)
 {
     parent::__construct($main);
     add_filter('login_redirect', array($this, 'login_redirect_callback'), 10, 3);
     add_action('admin_init', array($this, 'admin_init'));
     add_filter('show_admin_bar', array($this, 'show_toolbar'), 10, 1);
 }

 protected function _initHooks()
 {
     add_action('admin_init', array($this, 'admin_init'), 20);
     add_action('admin_menu', array($this, 'admin_menu'));
     add_action('network_admin_menu', array($this, 'network_admin_menu'));
     add_action('admin_head', array($this, 'admin_head'));
     add_action('wp_dashboard_setup', array($this, 'dashboard_setup'));
     add_action('wp_ajax_better-analytics_heatmaps', array($this, 'display_page'));
     add_action('wp_ajax_better-analytics_area_charts', array($this, 'display_page'));
     add_action('wp_ajax_better-analytics_monitor', array($this, 'display_page'));
     add_action('wp_ajax_better-analytics_events', array($this, 'display_page'));
     add_action('wp_ajax_better-analytics_charts', array($this, 'display_charts'));
     add_filter('plugin_action_links', array($this, 'plugin_action_links'), 10, 2);
     add_filter('wp_redirect', array($this, 'filter_redirect'));
     add_filter('admin_footer_text', array($this, 'admin_footer_text'));
     add_filter('all_plugins', array($this, 'all_plugins'));
     add_filter('plugin_row_meta', array($this, 'plugin_row_meta'), 10, 2);
     add_filter('wpmu_options', array($this, 'show_network_settings'));
     add_action('update_wpmu_options', array($this, 'save_network_settings'));
     add_filter('removable_query_args', array($this, 'removable_query_args'));
     $betterAnalyticsOptions = get_option('better_analytics');
     if (!$betterAnalyticsOptions['property_id']) {
         add_action('admin_notices', array($this, 'not_configured'));
     }
     if (!get_site_option('ba_site_tokens') && !get_option('ba_tokens')) {
         add_action('admin_notices', array($this, 'cant_auto_configure'));
     } elseif (!$betterAnalyticsOptions['api']['profile']) {
         add_action('admin_notices', array($this, 'can_auto_configure'));
     }
     if (get_transient('ba_last_error')) {
         add_action('admin_notices', array($this, 'last_error'));
     }
 }

 /**
  * Constructor
  */
 public function __construct()
 {
     add_filter('metaslider_css', array($this, 'get_theme_css'), 15, 3);
     add_filter('metaslider_css_classes', array($this, 'get_theme_css_classes'), 10, 3);
     add_action('admin_menu', array($this, 'register_theme_editor_menu'), 9556);
     add_filter('metaslider_get_available_themes', array($this, 'get_theme_select_options'), 10, 2);
 }

 /**
  *
  */
 private function __construct()
 {
     register_activation_hook(__FILE__, array($this, 'activate'));
     $this->includes();
     if (is_admin()) {
         $this->admin_includes();
     }
     add_filter('woocommerce_shipping_methods', array($this, 'add_method'));
     add_filter('woocommerce_checkout_fields', array($this, 'add_delivery_points_field'), 99);
     add_filter('woocommerce_default_address_fields', array($this, 'default_address_fields'), 99);
     add_filter('woocommerce_country_locale_field_selectors', array($this, 'add_city_id_field_selector'));
     add_filter('woocommerce_form_field_hidden', array($this, 'form_field_hidden'), 10, 4);
     add_action('woocommerce_after_checkout_billing_form', array($this, 'delivery_points_map'));
     add_action('woocommerce_checkout_process', array($this, 'delivery_point_field_process'));
     add_action('woocommerce_checkout_update_order_review', array($this, 'update_order_review'));
     add_action('woocommerce_checkout_update_order_meta', array($this, 'checkout_field_update_order_meta'));
     add_action('woocommerce_email_order_meta', array($this, 'email_order_meta'), 99);
     add_filter('default_checkout_state', array($this, 'default_checkout_state'));
     add_filter('pre_update_option_woocommerce_' . self::$method_id . '_settings', array($this, 'check_shop_contract'), 10, 2);
     add_filter('woocommerce_cart_shipping_packages', array($this, 'shipping_packages'), 10);
     //Ajax
     add_filter('woocommerce_update_order_review_fragments', array($this, 'ajax_update_delivery_points'));
     add_filter('woocommerce_params', array($this, 'is_door_params'));
     add_action('wp_enqueue_scripts', array($this, 'load_script'));
     add_action('admin_enqueue_scripts', array($this, 'admin_load_script'));
 }

function gsalborz_ahoy()
{
    //Allow editor style.
    //add_editor_style( get_stylesheet_directory_uri() . '/library/css/editor-style.css' );
    // let's get language support going, if you need it
    load_theme_textdomain('gsalborz', get_template_directory() . '/languages');
    // USE THIS TEMPLATE TO CREATE CUSTOM POST TYPES EASILY
    require_once 'library/custom-post-type.php';
    // launching operation cleanup
    add_action('init', 'gsalborz_head_cleanup');
    // A better title
    add_filter('wp_title', 'rw_title', 10, 3);
    // remove WP version from RSS
    add_filter('the_generator', 'gsalborz_rss_version');
    // remove pesky injected css for recent comments widget
    add_filter('wp_head', 'gsalborz_remove_wp_widget_recent_comments_style', 1);
    // clean up comment styles in the head
    add_action('wp_head', 'gsalborz_remove_recent_comments_style', 1);
    // clean up gallery output in wp
    add_filter('gallery_style', 'gsalborz_gallery_style');
    // enqueue base scripts and styles
    add_action('wp_enqueue_scripts', 'gsalborz_scripts_and_styles', 999);
    // ie conditional wrapper
    // launching this stuff after theme setup
    gsalborz_theme_support();
    // adding sidebars to Wordpress (these are created in functions.php)
    add_action('widgets_init', 'gsalborz_register_sidebars');
    // cleaning up random code around images
    add_filter('the_content', 'gsalborz_filter_ptags_on_images');
    // cleaning up excerpt
    add_filter('excerpt_more', 'gsalborz_excerpt_more');
}

 function run($core)
 {
     $this->core = $core;
     $this->settings = get_site_option('itsec_malware');
     $this->module_path = ITSEC_Lib::get_module_path(__FILE__);
     add_action('itsec_add_admin_meta_boxes', array($this, 'add_admin_meta_boxes'));
     //add meta boxes to admin page
     add_action('itsec_admin_init', array($this, 'initialize_admin'));
     //initialize admin area
     add_action('admin_enqueue_scripts', array($this, 'admin_enqueue_scripts'));
     //enqueue scripts for admin page
     add_action('wp_ajax_itsec_malware_request_url_scan_ajax', array($this, 'wp_ajax_itsec_malware_request_url_scan_ajax'));
     //Execute manual homepage scan request
     add_action('wp_ajax_itsec_malware_get_scan_results_ajax', array($this, 'wp_ajax_itsec_malware_get_scan_results_ajax'));
     //Execute manual homepage scan report
     add_filter('itsec_add_dashboard_status', array($this, 'dashboard_status'));
     //add information for plugin status
     add_filter('itsec_tracking_vars', array($this, 'tracking_vars'));
     add_filter('itsec_logger_displays', array($this, 'itsec_logger_displays'));
     //adds logs metaboxes
     //manually save options on multisite
     if (is_multisite()) {
         add_action('itsec_admin_init', array($this, 'save_network_options'));
         //save multisite options
     }
 }