php 中英文语言转换类代码

class language
{
static $lanObject;
public $type; // unit , dashboard , menu ,other
public $lan; // language
private $special; // The common in the file
private function __construct()
{
if( isset($_GET[hl]) || isset($_POST[hl]) )
{
switch( isset($_GET[hl])?$_GET[hl]:$_POST[hl] )
{
case en:
$this->lan = en;
case zh:
$this->lan = zh;
case all:
$this->lan = all;
default:
$this->error();
}
}
else
$this->lan = isset($_COOKIE[hl]) ? $_COOKIE[hl]:zh;
}
public static function getObject()
{
if( !(self::$lanObject instanceof self) )
self::$lanObject = new language();
return self::$lanObject;
}
public function lto($key) //$key is English
{
if( $this->lan !== zh )
return $key;
if( empty($this->special) ) // if the $special is null
{
if( isset($this->type) )
$this->special = file_get_contents($this->type..txt);
else
return $key;
}
echo $this->search($key);
}
private function search($searchTozh) // PHP String
{
$key_start = strpos($this->special,$searchTozh);
$key_end = strpos($this->special, ,$key_start);
$len_str = strlen($searchTozh);
$for_sub = $key_start + $len_str + 1;
return substr($this->special, $for_sub, $key_end - $for_sub);
}
}

$la = language::getObject();
$la->type = unit;
$la->lto(min);
echo <br/>;
$la->lto(hello);