php fsocketopen

好長(zhǎng)時(shí)間沒(méi)自己寫(xiě)fsockopen遠(yuǎn)程訪問(wèn)了，習(xí)慣了curl的強(qiáng)大，查了下資料寫(xiě)了段post方式代碼：

<?php

$url = 'test.fsk.com';
$fp = @fsockopen($url, 80, $errno, $errstr, 3);//遠(yuǎn)程打開(kāi)url
$str = "key1=val1&key2=val2";  //post數(shù)據(jù)

$flag = 0; //區(qū)分header和返回?cái)?shù)據(jù)  

$msg = '';//獲取返回的json數(shù)據(jù)

if (!$fp) { //失敗
   echo "$errstr ($errno)<br />\n";  
} else {

   ////根據(jù)實(shí)際調(diào)用填寫(xiě)url路徑和get方式參數(shù)  
   $out = "POST /controller/action?query_string HTTP/1.1\r\n";  

   $out .= "Host: " . $url . "\r\n";

   //post方式必須設(shè)置該type    
   $out .= "Content-Type: application/x-www-form-urlencoded\r\n";

   //post方式必須設(shè)置該length

   $out .= "Content-Length: " . strlen($str) . "\r\n";

   $out .= "Connection: Close\r\n\r\n";
   $out .= $str . "\r\n";  
   fwrite($fp, $out);
   
   while (!feof($fp)) {  
       $s = fgets($fp, 1024);
       $s = trim($s);
       //echo $s."<br />";
       if(empty($s)){
           $flag = 1;
       }elseif($flag == 1){//讀取返回的內(nèi)容
           $msg .= $s;
       }        
   }  
   fclose($fp);

   //打印數(shù)據(jù)
   var_dump(json_decode($msg));    
}