PHP发送post数据函数

原创来自cosrc.com

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用法例:
post('127.0.0.1','/test.php','a=asdfsdfsdf&b=kjhdsfkjhsdkjf');
function post($host,$path,$data)
{
    $fp = fsockopen($host, 80);
    fputs($fp,"POST $path HTTP/1.1\r\n");
    fputs($fp,"Host: $host\r\n");
    fputs($fp,"Content-type: application/x-www-form-urlencoded\r\n");
    fputs($fp,"Content-length: " . strlen($data) . "\r\n");
    fputs($fp, "User-Agent: MSIE\r\n");
    fputs($fp, "Connection: close\r\n\r\n");
    fputs($fp, $data);
    $buf='';
    while (!feof($fp)) {
        $buf .= fgets($fp,128);
    }
    fclose($fp);
    return $buf;
}