<?php
class Page {
	var $template;
	protected $params = array();

	function __construct($template, $fill = true) {
		ob_start(array($this, 'output'));
		$this->template = file_get_contents($template);
		if($fill)
			$this->fillTags();
	}
/*
	function __set($tag, $content) {
		$this->params['<!--$'.$tag.'-->'] = $content;
	}
*/
	function __get($tag) {
		return $this->params['<!--$'.$tag.'-->'];
	}

	function output($buffer) {
		$this->assign('buffer', $buffer);
		return str_replace(array_keys($this->params), array_values($this->params), $this->template);
	}

	function assign($id, $value = null) {
		if(is_array($id))
			foreach($id as $tag => $content)
				$this->params['<!--$'.$tag.'-->'] = $content;
		else
			$this->params['<!--$'.$id.'-->'] = $value;
	}
	
	private function fillTags() {
		preg_match_all('/<!--\$\w+-->/', $this->template, $a);
		foreach($a[0] as $tag)
			$this->params[$tag] = null;
	}
}