晒一上小弟我的模板引擎，欢迎拍砖

class template {

  protected $data = array();

  protected $drillmode = 0;

  function __construct($s) {

	if(file_exists($s)) $s = file_get_contents($s);

	$this->find_var($s);

	$this->data = explode('
	$this->data[0] = '';

	$this->find_dsn();

  }

  //新增 run 方法，

  function run() {

	//include "data://," . join('data);

	eval('?>' . join('data));

  }

  function find($pattern) {

	$this->pattern = $pattern;

	return array_filter($this->data, array($this, 'find_callback'));

  }

  private function find_dsn() {

	foreach($this->find("#\bdsn\b#i") as $k=>$v) {

		$t = $this->find_tag($tag = strtok($v, ' '), $k);

		end($t);

		$dsn[] = array( $k, key($t) );

	}

	if($this->drillmode) {

		foreach($this->find("#\bdrill\b#i") as $k=>$t) {

			foreach($dsn as $i=>$v) if($k  $v[0]) $t = $i;

			$drill[] = $dsn[$t];

			unset($dsn[$t]);

		}

	}

	foreach($dsn as $v) {

		list($start, $end) = $v;

		preg_match('/\bdsn\s*=\s*([^\s>]+)/i', $this->data[$start], $reg);

		$this->data[$start] = str_replace(' '.$reg[0], '', $this->data[$start]);


		$m = explode(',', trim($reg[1], '\'"')) + array(0, 0, '');

		$code_start = "?php if(isset(\$_var))\$_st[]=\$_var;foreach((isset(\$_var['$m[0]'])?\$_var['$m[0]']:\$this->$m[0]('$m[1]','$m[2]')) as \$_key=>\$_var){?>";

		$code_end = "?php }\$_var=array_pop(\$_st);?>";

		switch($m[1]) {

			case 0:

				$t = explode('>', $this->data[$start]);

				$t[1] = "
				$this->data[$start] = join('>', $t);

				$this->data[$end] = "$code_enddata[$end];

				break;

			case 1:

				$this->data[$end] .= "
				$this->data[$start] = "$code_startdata[$start];

				break;

			default:

				$n = round(100/$m[1]);

				$this->data[$end] .= "
				$this->data[$start] = "$code_start