[PHP]Template Replace (Object Oriented)

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<!--?php     class Template {                   public $filename;       public $assigned_vars=array();                   public function set($key, $value) {         $this--->assigned_vars[$key] = $value;       }                 public function display() {           if(file_exists($this->filename)) {             $output = file_get_contents($this->filename);             foreach($this->assigned_vars as $key => $value) {               $output = preg_replace('/{'.$key.'}/', $value, $output);             }             echo $output;           } else {             echo "*** Missing template error ***";           }         }     }           $template = new Template();     $template->filename = "template2.php";     $template->set('page_title', "Template Test");     $template->set('content', "This is a test of templating using search and replace.");     $template->display();   ?>   // template2.php               <title>{page_title}</title>                           <h1>{page_title}</h1>           <p>{content}</p>

Template Test

This is a test of templating using search and replace.