PHP Socket编程 之 深入解析fsockopen与pfsockopen的区别

按手册上说,这两个函数的唯一区别是,pfsockopen是持续连接,而fsockopen不是.

<? php
$data = "1,0,721,73,1,0,0,43290000,0,60D81D509BC00451,3,FFFFFFFF";
//http://10.144.99.114/SANEX_NEW/modules/subscribemanager/test.php
$host = '127.0.0.1';
$url = "/aa.php";
$pffirst = false;
$times = 1000;
$startTime = microtime(true);
for ($index = 0; $index < $times; $index++) {
    echo httpPost($host, $url, $data, $pffirst).
    "<hr><br />";
}
$middleTime = microtime(true);
for ($index = 0; $index < $times; $index++) {
    echo httpPost($host, $url, $data, !$pffirst).
    "<hr><br />";;
}
$endTime = microtime(true);
echo($pffirst ? "pfsocket" : "fsocket").
":".($middleTime - $startTime);
echo "<br />";
echo($pffirst ? "fsocket" : "pfsocket").
":".($endTime - $middleTime);

$count = 0;
//发包函数
function httpPost($host, $url, $data, $p) {
    global $count;
    $func = $p ? "pfsockopen" : "fsockopen";

    $conn = $func($host, 80, $errno, $errstr, 30);
    if (!$conn) {
        echo "$errstr ($errno)<br />\n";
        return;
    }

    $header = "POST ".$url.
    " HTTP/1.1\r\n";
    $header. = "Host : {$host}\r\n";
    $header. = "Content-type: application/x-www-form-urlencoded\r\n";
    $header. = "Content-Length:".strlen($data).
    "\r\n";
    $header. = "Connection: Keep-Alive\r\n\r\n";
    $header. = "{$data}\r\n\r\n";

    fwrite($conn, $header);

    $count++;
    echo $count.
    ' '.$header.
    "<br /><br />";

    $resp = '';
    //while (!feof($conn)) {
    // $resp .= fgets($conn);
    //}
    //fclose($conn);
    return $resp;
} ?>

结果发现:

代码的倒数第二行,如果把//fclose($conn);注释掉,结果是:

fsocket:11.04693198204
pfsocket:0.34867787361145

如果不注释:

fsocket:12.509312152863
pfsocket:11.120275974274

可以看出,fsocketopen默认每次处理结束后,就算协议头是Keep-Alive,连接仍然断掉了.
而pfsocketopen在Keep-Alive条件下,连接可以被下一次重复利用.
一次连接发送大量数据时,推荐使用pfsocketopen

文章来源www.cnblogs.com/7qin/p/13298658.ht...

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