A simple template engine class. This type of research is not perfect. I hope friends can participate in the study and research.

This is the first time I post code here. This code is mainly for PHP template engine technology research. Currently there is only a compiled version. I hope you can provide more opinions and optimization tips.
It consists of three files. I don’t know how to format it as a file, so I can only copy it. Sorry!
index.php is a configuration file, everyone will understand after taking a look
index.html Some usage examples
Templates.class.php base class
A perfect version of caching will be released later, but I hope it will not be cached. With the guidance of friends or experts, this template engine only needs to handle compilation and caching, and other considerations will not be considered for the time being. , of course, the regular replacement mode also needs to add f, w and so on. . .
I hope some friends can study my Q: 76376931

Copy_3_of_Templates.class.php file has added a cache method. Refreshing the page again will not generate a cache. It has not been considered whether some pages in the project need to be cached. This class will be added gradually in the future. I hope some friends can join me. comminicate!

header('Content-Type:text/html;charset=utf-8');
define('ROOT_HOST',dirname(__FILE__));
define('HTML_DIR',ROOT_HOST. '/moban/');
define('COMPILED_DIR',ROOT_HOST.'/data/compiled/');
define('CACHE_DIR',ROOT_HOST.'/data/cache/');
//Whether to enable the buffer
define('NEW_CACHE', false);
//Determine whether to open the buffer
NEW_CACHE? ob_start(): null;
//Introduce the template class
require ROOT_HOST.'/lib/Templates.class.php';

 $_moban = new Templates();

$array = array(a=>'Hello',b=>'I'm not very good, but I miss you very much',c=>'You are all here You're at home, why do you still miss me?');
$xcvu = 'Hello, this is an XCVU';
$zmq = "hi";
$title = "This is a template engine customization method!" ;
$ling = "Because a "function" is being modified????????????????";

$_moban->assign('ling', $ling);
$ _moban->assign('title',$title);
$_moban->assign('zmq', $zmq);
$_moban->assign('xcvu', $xcvu);
$_moban- >assign('abc',5>4);
$_moban->assign('array', $array);
$_moban->display('index.html');

?>

<!-- $title -->< ;/title><li><style type="text/css"><li>*{ margin:0; padding:0;}<li>body{ font-size:12px; color:#fff; background:#999;}<li> .index { margin:0 auto; width:960px; background:#fff;height:1000px; line-height:50px; padding:20px;color:#000;}<li>.index a{color:#000; text-decoration :none;}<li>.index a:hover{ color:#F0F;}<li></style></li>
<li>
<li>
<li><div class="index">
<li> <span style="color:#000;">BBBasd</span><span style="color:#000;">I don’t know what to say, but I want to say something</span>
</li>
<li> <a href="#"><!-- $ling --></a>
</li>
<li> <br>
</li>
<li> <!-- $xcvu --> </li>
<li> <br>
</li>
<li> <!-- if $abc -->
</li>
<li> <p>No.1</p>
</li>
<li> <!-- else -->
</li>
<li> <p>No.2 </p>
</li>
<li> <!-- /if -->
</li>
<li> <br>
</li>
<li> <!-- loop $array(k,v) -->
</li>
<li> <!-- @k -->........<!-- @v --><br>
</li>
<li> <!-- /loop -->
</li>
<li> <!-- #This is PHP comments -->
</li>
<li>
</div></li>
<li>
<li>

/* about:Richard.z
 * site:http://www.zmq.cc
 * E_mail:code@zmq.cc
 * date:2013/01/02/17:30
 * */
class Templates{
	private $_CaChe;
	private $_Compiled;
	private $_HtmlFile;
	private $_FileVar;
	private $_KeyArr = array();

	public function __construct(){
		if(!is_dir(HTML_DIR) || !is_dir(COMPILED_DIR) || !is_dir(CACHE_DIR)){
			exit('Your directory does not exist!');
		}
	}

	public function assign($_var, $_value){
		if(isset($_var) && !empty($_var)){
			$this->_KeyArr[$_var] = $_value;
		}else{
			exit('Please set your value!');
		}
	}

	public function display($_File){
		//设置模板的变量
		$this->_HtmlFile = HTML_DIR.$_File;
		//设置编译
		$this->_Compiled = COMPILED_DIR.md5($_File).$_File.'.php';
		//设置缓存
		$this->_CaChe = CACHE_DIR.md5($_File).$_File.'.html';
		//判断模板是否存在
		if(!file_exists($this->_HtmlFile)){
			exit('Template file does not exist');
		}
		//赋值和判断读取
		if(!$this->_FileVar = file_get_contents($this->_HtmlFile)){
			exit('The template file read error!');
		}
		//if edit Compiled File date 		if(!file_exists($this->_Compiled) || filemtime($this->_Compiled) _HtmlFile)){
			$this->Set_Comilled();
		}
		//Include Compiled
		include $this->_Compiled;
	}

	//public function
	public function Set_Comilled(){
		$this->SetArr();
		$this->SetInclude();
		if(!file_put_contents($this->_Compiled, $this->_FileVar)){
			exit('Compiled files generated error!');
		}
	}
	//arr
	private function SetArr(){
		$_preaa = array(
			'//',
			'//',
			'//',
			'//',
			'//',
			'//',
			'//',
			'//');
		$_prebb = array(
			'_KeyArr["$1"];?>',
			'_KeyArr["$1"]) {?>',
			'',
			'',
			'_KeyArr["$1"] as $$2=>$$3) { ?>',
			'',
			'',
			'');
		$this->_FileVar = preg_replace($_preaa, $_prebb, $this->_FileVar);
		if(preg_match($_preaa[0], $this->_FileVar)){
		$this->_FileVar = $this->SetArr($this->_FileVar);
			}
	}

	//Include
	private function SetInclude(){
		$_preFile = '//';
		if(preg_match($_preFile, $this->_FileVar,$_File)){
			if(!file_exists($_File[1]) || empty($_File)){
				exit('You of Include File Error!');
			}
			$this->_FileVar = preg_replace($_preFile, "", $this->_FileVar);
		}
	}

}
?>

/* about:Richard.z
 * site:http://www.zmq.cc
 * E_mail:code@zmq.cc
 * date:2013/01/02/17:30 || 2013/01/14/21:35
 * */
class Templates{
	private $_CaChe;
	private $_Compiled;
	private $_HtmlFile;
	private $_FileVar;
	private $_KeyArr = array();

	public function __construct(){
		if(!is_dir(HTML_DIR) || !is_dir(COMPILED_DIR) || !is_dir(CACHE_DIR)){
			exit('Your directory does not exist!');
		}
	}

	public function assign($_var, $_value){
		if(isset($_var) && !empty($_var)){
			$this->_KeyArr[$_var] = $_value;
		}else{
			exit('Please set your value!');
		}
	}

	public function display($_File){
		//设置模板的变量
		$this->_HtmlFile = HTML_DIR.$_File;
		//设置编译
		$this->_Compiled = COMPILED_DIR.md5($_File).$_File.'.php';
		//设置缓存
		$this->_CaChe = CACHE_DIR.md5($_File).$_File.'.html';
		//判断模板是否存在
		if(!file_exists($this->_HtmlFile)){
			exit('Template file does not exist');
		}
		//赋值和判断读取
		if(!$this->_FileVar = file_get_contents($this->_HtmlFile)){
			exit('The template file read error!');
		}
		//if edit Compiled File date 		if(!file_exists($this->_Compiled) || filemtime($this->_Compiled) _HtmlFile)){
			$this->Set_Comilled();
		}
		//Include Compiled
		include $this->_Compiled;
		$this->SetCaChe();
		}

		//The setting cache file if you want to be generated again
		private function SetCaChe(){
			if(!file_exists($this->_CaChe) || filemtime($this->_CaChe) _Compiled)){
				if(NEW_CACHE){
					file_put_contents($this->_CaChe, ob_get_contents());
					ob_end_clean();
					include $this->_CaChe;
				}
			}
		}

	//public function
	public function Set_Comilled(){
		$this->SetArr();
		$this->SetInclude();
		if(!file_put_contents($this->_Compiled, $this->_FileVar)){
			exit('Compiled files generated error!');
		}
	}
	//arr
	private function SetArr(){
		$_preaa = array(
			'//',
			'//',
			'//',
			'//',
			'//',
			'//',
			'//',
			'//');
		$_prebb = array(
			'_KeyArr["$1"];?>',
			'_KeyArr["$1"]) {?>',
			'',
			'',
			'_KeyArr["$1"] as $$2=>$$3) { ?>',
			'',
			'',
			'');
		$this->_FileVar = preg_replace($_preaa, $_prebb, $this->_FileVar);
		if(preg_match($_preaa[0], $this->_FileVar)){
		$this->_FileVar = $this->SetArr($this->_FileVar);
			}
	}

	//Include
	private function SetInclude(){
		$_preFile = '//';
		if(preg_match($_preFile, $this->_FileVar,$_File)){
			if(!file_exists($_File[1]) || empty($_File)){
				exit('You of Include File Error!');
			}
			$this->_FileVar = preg_replace($_preFile, "", $this->_FileVar);
		}
	}

}
?>