简单php 模板引擎

class TEMPLATE
{


private $path = "." ; #根目录

private $var;

private $tplDir = "template"; #模板存储目录

private $tplExt = "tpl"; #模板文件的后缀名

private $tplId = 0 ; #模板的ID号

private $compileDir = "template_c"; #编译后的php文件存放目录

private $isCache=false ; #是否用缓存 （默认不启动）

private $cacheId = 1; #缓存文件ID号

private $cacheLeftTime=3600; #缓存有效期 (默认保存3600秒)

private $cacheDir = "cache"; #缓存文件存储目录

private $autoRefresh = false ; #是否自动刷新

private $pattern = array(

"/({dw:)s*includes*filename=s*"(.+..+)s*"s*(/})/i",#包含文件
"/({dw:)s*field.(.+)s*(/})/i",#局部变量
"/({dw:)s*global.(.+)s*(/})/i",#全局变量
"/({dw:)s*foreachs*(.+)s*ass*(.+)s*(/})/i",#foreach 语句
"/({dw:)s*ends*foreachs*(/})/i", #foreach 结束
"/({dw:)s*ifs*((.+))(/})/i",
"/({dw:)s*elseifs*((.+))(/})/i",
"/({dw:)s*elses*(/})/i",
"/({dw:)s*ends*ifs*(/})/i",

);

private $replacement = array(

'inc_file(""); ?>',
"",
"",
"",
"",
"2) { ?>" ,
"2){ ?>",
"",
"",





);


#构造函数

function __construct($path = "", $tplDir="", $compileDir="",$isCache="",$cacheLeftTime="",$cacheDir="" ,$autoRefresh="")
{
$this->path = $path ? $path : $this->path ;

$this->tplDir = $tplDir ? $tplDir : $this->tplDir ;

$this->compileDir = $compileDir ? $compileDir : $this->compileDir ;

$this->isCache = is_bool($isCache) ? $isCache : $this->isCache ;

$this->cacheLeftTime = $cacheLeftTime ? $cacheLeftTime : $this->cacheLeftTime ;

$this->cacheDir = $cacheDir ? $cacheDir : $this->cacheDir ;

$this->autoRefresh = is_bool($autoRefresh) ? $autoRefresh : $this->autoRefresh ;
}


#兼容php4

function TEMPLATE($path = "", $tplDir="", $compileDir="",$isCache="",$cacheLeftTime="",$cacheDir="" ,$autoRefresh="")
{
$this->__construct($path = "", $tplDir="", $compileDir="",$isCache="",$cacheLeftTime="",$cacheDir="" ,$autoRefresh="");
}
function __get($property)
{
return $this->$property ;
}


function __set($property,$value)
{
return $this->$property = $value ;
}



#给模板中的变量赋值
# $tplVal 模板中的变量名

function assign($tplVal ,$value="")
{
if (is_array($tplVal))
{
foreach ($tplVal as $key => $val)
{
if (!empty($key))

$this->var[$key] = $val ;
}
}
else {
if (!empty($tplVal))

$this->var[$tplVal] = $value ;
}
}

#

function display($tplFile,$tplId=0,$cacheId = 1,$cacheLeftTime="")
{
if (empty($tplFile)) die("Template "{$tplFile}" not exist !");

$this->cacheId = $cacheId ? md5($cacheId) : md5($this->cacheId);

$cacheFile = $this->path. "/".$this->cacheDir."/".$tplFile.$this->cacheId ;

if ($this->check_cache($cacheFile,$cacheLeftTime)) #当缓存文件存在且不过期时直接从缓存文件读取内容
{
echo $this->read_file($cacheFile);
}else {

$tpl = $this->path."/".$this->tplDir."/".$tplFile.".".$this->tplExt;

$tplContent = $this->read_file($tpl); #读取模板文件的内容

$compileContent= $this->compile_file($tplContent); #对读取出来的文件进行编译

$this->tplId = $tplId ? $tplId : $this->tplId ;

$compileFile = $this->path."/".$this->compileDir."/".md5($this->tplId)."".$tplFile.".php";

$this->write_file($compileFile,$compileContent);#将编译后的内容写入相应的文件中;

@extract($this->var);

ob_start();

include_once($compileFile);

$content = ob_get_contents() ;

ob_end_clean() ;

if ($this->isCache){

$this->write_file($cacheFile,$content) ;# 帮编译好的内容写入缓存文件
}

echo $content ;

}
}


/* function trim_tag($content)
{
$content = str_replace($this->startTag,"",$content);

$content = str_replace($this->endTag,"",$content);

//$content = trim($content);

return $content ;
}*/

# 编译文件函数

function compile_file($content=null)
{

$content = $content ? $content :die("Compile fail!") ;

//$content = $this->trim_tag($content);

$content = preg_replace($this->pattern,$this->replacement,$content);

return $content;

}

#解析包含文件

function inc_file($filename,$tplId="",$cacheId="",$cacheLeftTime="")
{
$file = $this->path."/".$this->tplDir."/".$filename ;

if (file_exists($file))
{
$filename = str_replace(".".$this->tplExt,"",$filename);

return $this->display($filename,$tplId,$cacheId,$cacheLeftTime);
}
else die("Template "{$filename}" not exist");
}

#读取文件内容函数

function read_file($filename)
{
if (!file_exists($filename)) die("Read file fail") ;

return file_get_contents($filename);
}

#内容写入函数

function write_file($filename,$content,$mode="wb")
{

$filename = trim($filename);

$content = $content ? stripslashes(trim($content)) : exit();

if (!file_exists($filename))
{
$array = explode("/",$filename);

$count = count($array);

$path = "";

for ($i = 0 ; $i {
if(!file_exists($path .= $array[$i]."/"))
{
mkdir($path,0777);
}
}
}
$handle = fopen($filename,$mode) ;

fwrite($handle,$content);

fclose($handle);

return true;
}



# 清除缓存

function clear_dir($dir="")
{

$dir = $this->path."/".$dir;

$handle = opendir($dir);

if (file_exists($dir))
{
while ($file = readdir($handle))
{
if ($file !="." && $file != "..")

unlink($dir."/".$file);
}

closedir($handle);

return true;
}

else {
return false;
}


}

#清除所有缓存

function clear_all_cache()
{
if ($this->clear_dir($this->cacheDir) && $this->clear_dir($this->compileDir))


return true;
}



#检查缓存是否过期

function check_cache($cacheFile,$cacheLeftTime="")
{

$cacheLeftTime = $cacheLeftTime ? $cacheLeftTime : $this->cacheLeftTime;

if (!file_exists($cacheFile)) return false ;

$time = $this->get_time($cacheFile) + $cacheLeftTime ;

if ($time {
unlink($cacheFile);



return false;
}

return true;

}



# 获取文件最后编辑时间

function get_time($filename)
{
if (!file_exists($filename)) return false;

return filemtime($filename);
}



}

?>