php 模拟表单提交

function postSMS($url, $data = '')
{
    $row = parse_url($url);
    $host = $row['host'];
    $port = $row['port'] ? $row['port']:80;
    $file = $row['path'];
    while (list($k, $v) = each($data))
    {
        $post .= rawurlencode($k) . "=" . rawurlencode($v) . "&"; //转URL标准码
    }
    $post = substr($post , 0 , -1);
    $len = strlen($post);
    $fp = @fsockopen($host , $port, $errno, $errstr, 10);
    if (!$fp)
    {
        return "$errstr ($errno)\n";
    }
    else
    {
        $receive = '';
        $out = "POST $file HTTP/1.1\r\n";
        $out .= "Host: $host\r\n";
        $out .= "Content-type: application/x-www-form-urlencoded\r\n";
        $out .= "Connection: Close\r\n";
        $out .= "Content-Length: $len\r\n\r\n";
        $out .= $post;
        fwrite($fp, $out);
        while (!feof($fp))
        {
            $receive .= fgets($fp, 128);
        }
        fclose($fp);
        $receive = explode("\r\n\r\n", $receive);
        unset($receive[0]);
        return implode("", $receive);
    }
}