im trying to create a class to manage widgets. I have problems with a protected data in parent class:
Widget.php
/** Parent class **/
class Widget{
protected $html =""; //formated html data
// method to load views in {system_path}/widgets/{widget_name}/views/
protected function LoadView($filename){
if(!empty($filename) && is_string($filename)){
$output = "";
$dir = WIDGET_PATH . "views" . DS . $filename;
ob_start();
include($dir);
$output = ob_get_contents();
ob_end_clean();
return $output;
}
return NULL;
}
//method to render formated html data
public function Render(){
if(isset($this->html) && !empty($this->html)){
return $this->html;
}
return NULL;
}
//static method to load a Widget
public static function Load($widgetName){
if(!empty($widgetName) && is_string($widgetName)){
$widgetName = strtolower($widgetName);
if(file_exists(WIDGET_PATH . $widgetName . DS . $widgetName . ".php")){
include_once(WIDGET_PATH . $widgetName . DS . $widgetName . ".php");
if(class_exists($widgetName."_Widget")){
$class = $widgetName."_Widget";
return new $class();
}
}
}
return FALSE;
}
}
/widgets/socialbar.php
/** SocialBar Widget **/
class Socialbar_Widget extends Widget
{
public function __construct(){
$this->html = "demo"; // test to see if it works
}
}
index.php
/*load class files, etc */
$Social = Widget::Load("socialbar"); //works, perfectly loads Socialbar_Widget()
var_dump($social); // works : object(Socialbar_Widget)[29] protected html = 'demo' ......
$Social->Render(); // throws Fatal error: Using $this when not in object context
To extend a variable inside parent class should i use "public"? Or what i mistake. Thanks for help guys.
Your class name is class Socialbar_Widget, Your are calling it in lower case
$Social = Widget::Load("socialbar")
and in load method you are doing strtolower($widgetName).
Check class file name.php. Load function may have returning false.