Native simple PHP template engine

View.php

<?php
 
class View 
{
    /** @var string Path to template */
    protected $_path;

    /** @var array Variables for template */
    public $_var = array();
 
    public function __construct($path) 
    {
        $this->_path = $path;
    }
    
    /**
     * Assign variable to template.
     * 
     * @param string|array $name
     * @param string $value
     */
    public function assign($name, $value) 
    {
        if (is_array($name)) {
            foreach($name as $k => $v) {
                $this->_var[$k] = $v;
            }
        } else {
            $this->_var[$name] = $value;  
        } 
    }
    
    /**
     * Fetch template with params.
     * 
     * @param string $template Name of template
     * @param array $params Variables for template
     * 
     * @return string Rendered template
     */
    private function fetch($template, array $params = array())
    {
        if (is_array($params) AND count($params) > 0) 
        {
            $this->assign($params);
        }

        $this->_template = $this->_path . $template;

        if (!file_exists($this->_template)) 
        {
            throw new \Exception('Template not found: ' . $this->_template);
        } else {
            ob_start();
            extract($this->_var);
            include($this->_template);
            return ob_get_clean();
        }
    }
    
    /**
     * Display template.
     * 
     * It is a good practice to assign the variables at the end of the controller 
     * with the array as a parameter, instead of using a single method assign().
     * 
     * @param string $template
     * @param array $params
     */
    public function display($template, array $params = array())
    {
        echo $this->fetch($template, $params);
    }
}