php中用fsockopen来跨站点请求

Php最让我感觉不错的地方是这个函数fsockopen，记得以前的B2C网站就是通过这个函数实现前台和订单处理系统的交互。还有一个以curl_开头的函数，可以实现很多功能。有时间要好好研究！下面是关于fscokopen的介绍

1.fsockopen函数说明：

    Open Internet or Unix domain socket connection（打开套接字链接）

   Initiates a socket connection to the resource specified by target .

   fsockopen() returns a file pointer which may be used together with the other file functions (such as fgets() , fgetss() , fwrite() , fclose() , and feof() ).就是返回一个文件句柄

2.实例一：跨站点请求

Php代码 
function getblogdata($ip,$condition,$url){  
    $req=$condition;  
    $header .= "POST $url HTTP/1.0\r\n";  
    $header .= "Content-Type: application/x-www-form-urlencoded\r\n";  
    $header .= "Content-Length: " . strlen($req) . "\r\n\r\n";  
      
    $fp = fsockopen ($ip,80, $errno, $errstr,30);  
    if(!$fp){  
       _log('--ERROR--'.$ip.' can not open');  
    }else{  
      while (!feof($fp)) {  
       fputs ($fp, $header . $req);  
       $res = fgets ($fp, 204800);  
      }  

function getblogdata($ip,$condition,$url){
    $req=$condition;
    $header .= "POST $url HTTP/1.0\r\n";
    $header .= "Content-Type: application/x-www-form-urlencoded\r\n";
    $header .= "Content-Length: " . strlen($req) . "\r\n\r\n";
   
    $fp = fsockopen ($ip,80, $errno, $errstr,30);
    if(!$fp){
       _log('--ERROR--'.$ip.' can not open');
    }else{
      while (!feof($fp)) {
       fputs ($fp, $header . $req);
       $res = fgets ($fp, 204800);
      }
     }
     fclose ($fp);

     return $res;

}

  使用：

         $domain='blog.m6699.com';

         $file='http://blog.m6699.com/deccm_interface.php';

         $condition='limit=12&count='.$usernum;
         $data17=getblogdata($domain,$condition,$file);

3.实例二：抓取网页

Php代码 
$fp = fsockopen("www.example.com", 80, $errno, $errstr, 30);  
if (!$fp) {  
    echo "$errstr ($errno)<br />\n";  
} else {  
    $out = "GET / HTTP/1.1\r\n";  
    $out .= "Host: www.example.com\r\n";  
    $out .= "Connection: Close\r\n\r\n";  
 
    fwrite($fp, $out);  
    while (!feof($fp)) {  
        echo fgets($fp, 128);  
    }  
    fclose($fp);  
} 

$fp = fsockopen("www.example.com", 80, $errno, $errstr, 30);
if (!$fp) {
    echo "$errstr ($errno)<br />\n";
} else {
    $out = "GET / HTTP/1.1\r\n";
    $out .= "Host: www.example.com\r\n";
    $out .= "Connection: Close\r\n\r\n";

    fwrite($fp, $out);
    while (!feof($fp)) {
        echo fgets($fp, 128);
    }
    fclose($fp);
}

后话:虽然fsockopen可以实现很多功能,不过个人还是觉的curl好用一点