一个简单的模板类--编译型的(simplet类增强后)

在上次发布的simplet类之后（http://bbs.phpchina.com/thread-85257-1-1.html），发现有很多缺陷，例如不支持多维数组，注释和没有缓存功能，这次我把这些功能都加进去了！！！
大家有兴趣的话，我下次出个教程，来谈谈我写这个类的一些思想和方法！！！支持的话可以跟贴支持我！
PHP代码:
simplet.class.php
class SimpleT {
private $t_vars;
private $templates_dir;
private $templates_c_dir;
private $cache;
private $cache_dir;

public function __construct() {
$this->templates_dir = ./templates/;
$this->templates_c_dir = ./templates_c/;
$this->cache = 0;
$this->cache_dir = ./cache/;
}
public function setDir($dir, $type = template) {
if(is_dir($dir)) {
if($type == template)
$this->templates_dir = rtrim($dir, /)./;
elseif($type == template_c)
$this->templates_c_dir = rtrim($dir, /)./;
elseif($type == cache)
$this->cache_dir = rtrim($dir, /)./;
else
return false;
return true;
} else {
return false;
}
}

public function cache($time) {
if(is_numeric($time)) {
$this->cache = $time;
return true;
} else {
return false;
}
}

public function assign($var, $value = NULL) {
if (is_array($var)) {
foreach ($var as $key => $val) {
$this->t_vars[$key] = $val;
}
} else {
$this->t_vars[$var] = $value;
}
}
private function comp($filename) {
try {
if(!$fp = fopen($filename, r)) {
throw new Exception(Can not open . $filename);
}
$filesize = filesize($filename);
if($filesize throw new Exception(The file size must > 0 );
}
$content = fread($fp, $filesize);
fclose($fp);
unset($fp);

$content = preg_replace("//","", $content);
$content = preg_replace("//", " \$$1_val) { ?>",$content);
$content = preg_replace("//", "", $content);
$content = preg_replace("//", " \$$3) { ?>", $content);
$content = preg_replace("//", "", $content);
$content = preg_replace("//", "", $content);
$content = preg_replace("//", "", $content);
$content = preg_replace("//","", $content);
$content = preg_replace("/([^]{0,})/", "", $content);
if (preg_match_all("/)]{1,})}%>/", $content, $files)) {
$this->comp($this->templates_dir . $files[1][0]);
}
$content = preg_replace("/)]{1,})}%>/", "templates_c_dir}simplet_comp_$1.php; ?>", $content);
echo $content;
$fp = fopen($this->templates_c_dir . simplet_comp_ . basename($filename) . .php, w);
if(!fwrite($fp, $content)) {
throw new Exception(Can not write content in the . $filename);
&

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