php 异步请求文件，实现多线程源码
$content='';
$fp = fsockopen(www.php100.com, 80, $errno, $errstr, 30);
if (!$fp) {
echo $errstr ($errno)
\n;
} else {
$out = post /test.php?id=5.$content. http/1.1\r\n;
$out .= host:www.php100.com\r\n;
$out .= content-length: . strlen($content) .\r\n;
$out .= connection: close\r\n\r\n;
$out .= $content;
$out .= \r\n\r\n;
fwrite($fp, $out);
/*//忽略执行结果
while (!feof($fp)) {
echo fgets($fp, strlen($content));
} */
echo 'zhinxging';
fclose($fp);
}