php中curl、fsockopen的应用

最近要用到通过post上传文件,网上盛传的有curl的post提交和fsockopen,其中curl最简单,于是从最简单的说起。

这是简单的将一个变量post到另外一个页面

$url = '';
$data = array('a'=> 'b');
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, $url);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($ch, CURLOPT_POST, true);
curl_setopt($ch, CURLOPT_POSTFIELDS, $data);
$ret = curl_exec($ch);
curl_close($ch);
主要说下这个选项CURLOPT_RETURNTRANSFER:如果设置为true/1,则curl_exec的时候不会自动将请求网页的内容输出到屏幕,$ret为请求网页的内容,如果设置为false/0,则curl_exec的时候会自动将请求网页的内容输出到屏幕,此时如果请求成功的话$ret的内容是1或者true。

下面是上传本地文件的代码,如果需要上传远程文件,则先down到本地,然后删掉即可(如有同学有别的办法还请告知):

$url = '';
$file = '1.jpg';
$field['uploadFile'] = '@'.$file;(uploadFile为接收端的name名)
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, $url);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($ch, CURLOPT_POST, 1);
curl_setopt($ch, CURLOPT_POSTFIELDS, $field);
$ret = curl_exec($ch);
curl_close($ch);

-------------------------------------------------------------------------------------

这是fsockopen的办法:
        $uploadInfo = array(
                'host'=>'',
                'port'=>'80',
                'url'=>'/upload.php'
        );
        $fp = fsockopen($uploadInfo['host'],$uploadInfo['port'],$errno,$errstr);

    $file = '1.jpg';

                $content = file_get_contents($file);
                $boundary = md5(time());
                $out.="--".$boundary."\r\n";
                $out.="Content-Disposition: form-data; name=\"uploadFile\"; filename=\"".$file."\"\r\n";
                $out.="Content-Type: image/jpg\r\n\r\n";
                $out.=$content."\r\n";
                $out.="--".$boundary."\r\n";

 

                fwrite($fp,"POST ".$uploadInfo['url']." HTTP/1.1\r\n");
                fwrite($fp,"Host:".$uploadInfo['host']."\r\n");
                fwrite($fp,"Content-Type: multipart/form-data; boundary=".$boundary."\r\n");
                fwrite($fp,"Content-length:".strlen($out)."\r\n\r\n");
                fwrite($fp,$out);
                while (!feof($fp)){
                        $ret .= fgets($fp, 1024);
                }
                fclose($fp);
                $ret = trim(strstr($ret, "\r\n\r\n"));
                preg_match('/http:.*/', $ret, $match);
                return $match[0];

 

附上一篇curl的帖子 http://www.cnblogs.com/lmule/archive/2010/10/27/1862734.html

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