PHP使用socket通过POST的方式来请求页面

/**
 * 使用socket通过POST的方式来请求页面
 * $Author: liulipeng $
 * $Id: activity.php 17063 2012-07-12 15:45:46Z liulipeng $
 */
function virtualPost($url, $data) {
    $url = parse_url($url);
    if (!isset($url['port']))  $url['port'] = "";
    if (!isset($url['query'])) $url['query'] = "";
    $encoded = "";
    while (list($k,$v) = each($data)) {
        $encoded .= ($encoded ? "&" : "");
        $encoded .= rawurlencode($k)."=".rawurlencode($v);
    }
    $fp = fsockopen($url['host'], $url['port'] ? $url['port'] : 80);
    //发送
    fputs($fp, sprintf("POST %s%s%s HTTP/1.0\n", $url['path'], $url['query'] ? "?" : "", $url['query']));
    fputs($fp, "Host: $url[host]\n");
    fputs($fp, "Content-type: application/x-www-form-urlencoded\n");
    fputs($fp, "Content-length: " . strlen($encoded) . "\n");
    fputs($fp, "Connection: close\n\n");
    fputs($fp, "$encoded\n");
    //接受
    $line = fgets($fp,1024);
    //滤掉空行
    $results = "";
    $inheader = 1;
    while(!feof($fp)) {
        $line = fgets($fp,1024);
        //把剩余的头信息过滤掉
        if ($inheader && ($line == "\n" || $line == "\r\n")) {
        $inheader = 0;
        }elseif (!$inheader) {
        $results .= $line;
        }
    }
    fclose($fp);
    return $results;
}