$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);

$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);

$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];

$fp = fsockopen($host, 80, $errno, $errstr, 30);

$fp = pfsockopen($host, 80, $errno, $errstr, 30);

$fp = fsockopen($host, 80, $errno, $errstr, 30);

$fp = stream_socket_client($host."80", $errno, $errstr, 30);

function b_fsockopen($host, $port, &$errno, &$errstr, $timeout) {
 $ip = gethostbyname($host);
 $s = socket_create(AF_INET, SOCK_STREAM, 0);
 if (socket_set_nonblock($s)) {
 $r = @socket_connect($s, $ip, $port);
 if ($r || socket_last_error() == EINPROGRESS) {
  $errno = EINPROGRESS;
  return $s;
 }
 }
 $errno = socket_last_error($s);
 $errstr = socket_strerror($errno);
 socket_close($s);
 return false;
}