public function render($filter = null) : string
    {
        // Is output empty ?
        if (empty($this->output)) {

            // Extract variables as references
            extract(array_merge($this->vars, View::$global_vars), EXTR_REFS);

            // Turn on output buffering
            ob_start();

            // Include view file
            include($this->view_file);

            // Output...
            $this->output = ob_get_clean();
        }

        // Filter output ?
        if ($filter !== null) {
            $this->output = call_user_func($filter, $this->output);
        }

        // Return output
        return $this->output;
    }
public function render($filter = null) : string
    {
        // Is output empty ?
        if (empty($this->output)) {

            // Extract variables as references
            extract(array_merge($this->vars, View::$global_vars), EXTR_REFS);

            // Turn on output buffering
            ob_start();

            // Include view file
            include($this->view_file);

            // Output...
            $this->output = ob_get_clean();
        }

        // Filter output ?
        if ($filter !== null) {
            $this->output = call_user_func($filter, $this->output);
        }

        // Return output
        return $this->output;
    }
public function render ( $ filter = null ) : string { // Is output empty ? if ( empty ( $ this -> output ) ) { // Extract variables as references extract ( array_merge ( $ this -> vars , View :: $ global_vars ) , EXTR_REFS ) ; // Turn on output buffering ob_start ( ) ; // Include view file include ( $ this -> view_file ) ; // Output... $ this -> output = ob_get_clean ( ) ; } // Filter output ? if ( $ filter !== null ) { $ this -> output = call_user_func ( $ filter , $ this -> output ) ; } // Return output return $ this -> output ; }
Include the view file and extracts the view variables before returning the generated output.

// Get view
$output = $view->render();

// Display output
echo $output;

@param  string $filter Callback function used to filter output
@return string
Include the view file and extracts the view variables before returning the generated output .