php post请求乱码的有关问题

php post请求乱码的问题
使用最土模板里的post请求源码如下

<br />
	static public function DoPost($url,$post_data=array()){<br />
		$url2 = parse_url($url);<br />
		$url2["path"] = ($url2["path"] == "" ? "/" : $url2["path"]);<br />
		$url2["port"] = ($url2["port"] == "" ? 80 : $url2["port"]);<br />
		$host_ip = @gethostbyname($url2["host"]);<br />
		$fsock_timeout = 2; //2 second<br />
		if(($fsock = fsockopen($host_ip, $url2['port'], $errno, $errstr, $fsock_timeout)) < 0){<br />
			return false;<br />
		}<br />
		$request =  $url2["path"].($url2["query"] ? "?" . $url2["query"] : "");<br />
		$post_data2 = http_build_query($post_data);<br />
		$post_data2=urldecode($post_data2);<br />
		$in  = "POST " . $request . " HTTP/1.0\r\n";<br />
		$in .= "Accept: */*\r\n";<br />
		$in .= "Host: " . $url2["host"] . "\r\n";<br />
		$in .= "User-Agent: Lowell-Agent\r\n";<br />
		$in .= "Content-type: application/x-www-form-urlencoded\r\n";<br />
		$in .= "Content-Length: " . strlen($post_data2) . "\r\n";<br />
		$in .= "Connection: Close\r\n\r\n";<br />
		$in .= $post_data2 . "\r\n\r\n";<br />
		unset($post_data2);<br />
		if(!@fwrite($fsock, $in, strlen($in))){<br />
			fclose($fsock);<br />
			return false;<br />
		}<br />
		return self::GetHttpContent($fsock);<br />
	}<br />
<br />
	static private function GetHttpContent($fsock=null) {<br />
		$out = null;<br />
		while($buff = @fgets($fsock, 2048)){<br />
			$out .= $buff;<br />
		}<br />
		fclose($fsock);<br />
		$pos = strpos($out, "\r\n\r\n");<br />
		$head = substr($out, 0, $pos);    //http head<br />
		$status = substr($head, 0, strpos($head, "\r\n"));    //http status line<br />
		$body = substr($out, $pos + 4, strlen($out) - ($pos + 4));//page body<br />
		if(preg_match("/^HTTP\/\d\.\d\s([\d]+)\s.*$/", $status, $matches)){<br />
			if(intval($matches[1]) / 100 == 2){<br />
				return $body;  <br />
			}else{<br />
				return false;<br />
			}<br />
		}else{<br />
			return false;<br />
		}<br />
	}<br />

实现的是http短信发送 因为运营商没有urldecode 我这里只能想到参数原文字请求 发送到手机的短信是乱码的本人接触php也不久 想请教下各位 有没有什么办法 能解决乱码问题。
可不可以通过其他方式请求http。

PHP 乱码