自定義插件激活時，Widget部分上的Wordpress邊欄不顯示

Question

Hello Team, 

    I am using the latest version of WordPress(4.7.2). My custom plugin works smoothly up to 4.5.2. when I tried to install the plugin, upon activation, on the widget area section, sidebar section is not displayed. 

該插件在以前的Wordpress版本上運行正常。但現在它沒有顯示。請幫我找到一個解決方案。

過去幾天我一直堅持這一點。如果你們幫我找到最好的解決方案，這將會很有幫助。 [查看管理區小部件顯示] [1]

Please see the following code: 

    <?php 
    /** 
    * Add actions to widgets_init to load the widget. 
    */ 
    add_action("widgets_init", "daily_quotes_load_widgets"); 
    add_action("wp_enqueue_scripts", "daily_quotes_enqueue_scripts"); 


    /* 
    * fucntion to display contents in the webpage 
    * @param null 
    * @return display contents in a webpage 
    */ 


    if (!function_exists('writeLog')) { 

     /** 
     * Function to add the plugin log to wordpress log file, added by BDT 
     * @param object $log 
     */ 
     function writeLog($log, $line = "",$file = "") { 

      if (WP_DEBUG === true) { 

       $pluginLog = $log ." on line [" . $line . "] of [" . $file . "]\n"; 

       if (is_array($pluginLog) || is_object($pluginLog)) { 
        print_r($pluginLog, true); 
       } else { 
        error_log($pluginLog); 
       } 

      } 
     } 

    } 


    /** 
    * function to register the widget "daily_quotes" 
    * @author Test 
    */ 
    function daily_quotes_load_widgets() { 
     register_widget("Daily_Quotes"); 
    } 

    /** 
    * function to enqueue the styles and scripts used in the widget "daily_quotes" 
    * @author Test 
    */ 
    function daily_quotes_enqueue_scripts() { 
     wp_enqueue_style("styles", plugin_dir_url(__FILE__) . "styles.css"); 
     wp_enqueue_script("scripts", plugin_dir_url(__FILE__) . "scripts.js", array("jquery"), "1.0.0", true); 
    } 

    /** 
    * Daily_Quotes: Class which contains the functions for the display of the Daily Quote widget 
    * 
    * @author Test 
    */ 
    class Daily_Quotes extends WP_Widget { 

     protected $plugin_slug; 

     /** 
     * Constructor 
     */ 
     function Daily_Quotes() { 
      include(plugin_dir_path(__FILE__) . 'class-quotery-quote.php'); 
      $this->plugin_slug = Quotery_Quote::get_instance()->get_plugin_slug(); 
      $idBase = "daily_quotes_id"; 
      $name = "Daily Quotes"; 
      $description = "A widget that displays the daily inspirational quotes."; 

      /* Widget settings. */ 
      $widgetOptions = array(
       "classname" => "daily_quotes", // CSS classname of the widget container 
       "description" => $description // widget description which appears in admin area (Available widgets) 
      ); 

      /* Widget control settings. */ 
      $controlOptions = array(
       "width" => 250, // width of the fully expanded control form in admin area (Sidebar) //modified the width ref : #103336 
       "id_base" => $idBase // ID of the widget container. This is used for multi-widgets . Id of each instance will be like {$id_base}-{$unique_number} 
      ); 

      /* Create the widget. */ 
      $this->WP_Widget($idBase, $name, $widgetOptions, $controlOptions); 
     } 

     /** 
     * Function to display the daily_quotes widget on the screen. 
     * 
     * @param Array $args array of arguments 
     * @param Object $instance widget instance 
     * @author Test 
     */ 
     function widget($args, $instance) { 
      global $post; 

      /* Our variables from the widget settings. */ 
      $title = apply_filters("widget_title", $instance["title"]); 


      echo $args["before_widget"]; 
      Quotery_Quote::get_instance()->quote_html($instance); 
      ?> 
      <?php 
      echo $args["after_widget"]; 
     } 

     /** 
     * function to update the widget settings in admin area. 
     * @param Object $newInstance New instance of the widget 
     * @param Object $oldInstance Old instance of the widget 
     * @return Object updated instance of the widget 
     * @author Test 
     */ 
     function update($newInstance, $oldInstance) { 
      $instance = $oldInstance; 

      /* Strip tags for title and name to remove HTML. */ 
      $instance["title"] = strip_tags($newInstance["title"]); 

      $instance["author"] = strip_tags($newInstance["author"]); 

      $instance['topics'] = Quotery_Quote::get_instance()->filter_in_array($new_instance['topics'], Quotery_Quote::get_instance()->get_topics_options()); 

      /* Strip tags for message and name to remove HTML. */ 
      $instance["topics"] = strip_tags($newInstance["topics"]); 

      /* Strip tags for message and name to remove HTML. */ 
      $instance["border"] = strip_tags($newInstance["border"]); 

     writeLog("Updated the daily quote with the new admin settings", basename(__LINE__), basename(__FILE__)); 

      return $instance; 


     } 

     /** 
     * Displays the widget settings on the widget panel in admin area. 
     * @param Object Widget instance 
     * @author Test 
     */ 
     function form($instance) { 

      $instance = wp_parse_args(
        (array) $instance, Quotery_Quote::get_instance()->get_quote_default_settings() 
      ); 

      /* Default widget settings. */ 
      $defaults = array("title" => ""); 
      $defaults = array("topics" => ""); 
      $defaults = array("border" => ""); 
      $defaults = array("author" => ""); 
      $instance = wp_parse_args((array) $instance, $defaults); 
      ?> 

      <!-- Widget Title: Text Box --> 
      <p> 
       <label for="<?php echo $this->get_field_id("title"); ?>"> 
        <?php _e("Title", "daily_quotes") . " : "; ?> 
       </label> 
       <input id="<?php echo $this->get_field_id("title"); ?>" name="<?php echo $this->get_field_name("title"); ?>" value="<?php echo $instance["title"]; ?>" /> 
      </p> 

      <p> 
       <label for="<?php echo $this->get_field_id('topics'); ?>"><?php _e('Topic:', $this->plugin_slug) ?></label> 
       <select class="widefat" id="<?php echo $this->get_field_id('topics'); ?>" name="<?php echo $this->get_field_name('topics'); ?>"> 
        <?php foreach (Quotery_Quote::get_instance()->get_topics_options() as $value => $name): ?> 
         <option value="<?php echo $value ?>"<?php echo $value == $instance['topics'] ? ' selected="selected"' : '' ?>><?php echo $name ?></option> 
        <?php endforeach ?> 
       </select> 
      </p> 

      <!-- Widget Title: Text Box --> 
      <p> 
       <label for="<?php echo $this->get_field_id("border"); ?>"> 
        <?php _e("Border Color", "daily_quotes") . " : "; ?> 
       </label> 
       <input id="<?php echo $this->get_field_id("border"); ?>" name="<?php echo $this->get_field_name("border"); ?>" value="<?php echo $instance["border"]; ?>" /> 
      </p> 

      <?php 
     } 

    } 
    ?> 




    [1]: https://i.stack.imgur.com/iabkL.png 

Answer 1

Notice: The called constructor method for WP_Widget in Daily_Quotes is deprecated since version 4.3.0! Use

__construct()

instead. in D:\xampp\htdocs\demowp\wp-includes\functions.php on line 3891

聲明一個函數，然後調用解決這一問題的父類的構造。

class Daily_Quotes extends WP_Widget { 
function __construct(){ 
    parent::__construct(...) // calls constructor from WP_Widget class 
} 
}