没啥解说。。直接代码：

 JTemplate.class.php

    templateDir = $templateDir;		$this->templateCompileDir = $templateComplieDir;		}	/**	 * 显示模板	 * @param string $fileName 模板文件名	 */	public function display($fileName){		$this->fileName = $fileName;		if(file_exists($this->templateDir.'/'.$this->fileName)){			$compileFileName = $this->templateCompileDir.'/'.$this->file_safe_name().'.php';			if(!file_exists($compileFileName) || filemtime($compileFileName)< filemtime($this->templateDir.'/'.$this->fileName)){				$this->del_old_file();				$this->compile();			}			extract($this->templateVar);			include $compileFileName;		}else{			$this->error('Sorry,the template file '.$this->fileName.' does not exist!!');		}	}	/**	 * 获取编译文件名	 */	private function get_compile_file(){		$compileFile = explode('.',$this->fileName);		unset($compileFile[count($compileFile)-1]);		return implode('.',$compileFile);	}	/**	 * 编译	 */	private function compile(){		$fileHandle = @fopen($this->templateDir.'/'.$this->fileName, 'r');		while(!feof($fileHandle)){			$fileContent = fread($fileHandle,1024);		}		fclose($fileHandle);		$fileContent = $this->template_replace($fileContent);		//$compileFile = $this->get_compile_file($fileName);		$fileHandle = @fopen($this->templateCompileDir.'/'.$this->file_safe_name().'.php','w');		if($fileHandle){			fwrite($fileHandle, $fileContent);			fclose($fileHandle);		}else{			$this->error('Sorry,Compile dir can not write!');		}	}	/**	 * 模板传值	 * @param string $valueName 模板中使用的变量名	 * @param $value 变量值	 */	public function assign($valueName,$value){		$this->templateVar[$valueName] = $value;	}		/**	 * 模板正则替换	 * @param string $content 替换内容	 *   string 替换过后的内容	 */	private function template_replace($content){		$orginArray = array(			'/
    /s',			'/
    /s',       		'/
    (.+?)
    /s',       		'/
    /s',       		'/
    /s',			'/
    /s',			'/
    /s',			'/
    /s',			'/\{P:(.+?)\:}/s',			'/\{C:(\w+)\}/s',			'/\{I:(.+?)\}/s',			'/\{F:(.+?)\}/s',			'/\{EF:(.+?)\}/s',			'/\{([a-zA-Z0-9_\[\]\'\"\$\.\x7f-\xff]+)\}/s',		);				$changeArray = array(			'
    ',			'
    $$3){$countLoop++;?>',       		'
    $1
    ',       		'
    ',       		'
    ',       		'
    ',       		'
    ',       		'
    ',       		'
    ',       		'
    ',       		'
    templateDir.'/$1";?>',       		'
    ',       		'
    ',       		'
    ',		);		return $repContent=preg_replace($orginArray,$changeArray,$content);	}	/**	 * 删除旧文件	 */	private function del_old_file(){		$compileFile = $this->get_compile_file($this->fileName);		$files = glob($this->templateCompileDir.'/'.$compileFile.'*.php');		// print_r($files);		if($files){			@unlink($files[0]);		}	}	/**	 * 编译文件名安全处理方法	 *   string 返回编译文件名	 */	private function file_safe_name(){		$compileFile = $this->get_compile_file($this->fileName);		return $compileFile.filemtime($this->templateDir.'/'.$this->fileName);	}		/**	 * 错误输出函数	 * @param string $content 错误输出信息	 */	private function error($content){		$stringHtml = '
    
     ';		$stringHtml .= 'Error information:
     
';		$stringHtml .= '
     ';		$stringHtml .= $content;		$stringHtml .= '';		$stringHtml .= '
    
';		exit($stringHtml);	}}?>

index.php

    assign('a', $a);$template->display('index.html');?>