PHP中的永久本地域套接字 [英] Persistent local domain socket in php

问题描述

我对这个问题找到的答案（例如此处，此处 ，并且这里）都涉及pfsockopen（），似乎适用于非本地套接字连接。但是，到目前为止，我编写的代码使用php通过本地连接访问C ++服务器。我希望这种连接是持久的（顺便说一下，这样我就可以将其用于Comet）。这是我的非永久版本：

The answers I've found to this question (such as here, here, and here) all involve pfsockopen(), which seems geared to non-local socket connections. However, the code I've written so far uses php to access a C++ server through a local connection. I want this connection to be persistent (so that I can use it for Comet, incidentally). Here's my non-persistent version:

<?php
session_start();

...

if (($sock = socket_create(AF_UNIX, SOCK_STREAM,0)) === false)
{
echo "socket_create() failed: reason: " . socket_strerror(socket_last_error()) . "\n";
        exit();
}
$sess_id = $_SESSION['sess_id'];
$sock_str = '/tmp/sockdir/' . $sess_id; //The socket is named after the php session, not important
if (socket_connect($sock, $sock_str) === false)
{
        echo "socket_connect() to " . $sock_str . " failed: reason: " . socket_strerror(socket_last_error($sock)) . "\n";
        socket_close($sock);
        exit();
}

$msg = $_GET['message'];

// ... do things with $msg

socket_close($sock);
?>

现在我不能简单地将'$ sock'保存为$ _SESSION变量并分别访问每个变量我发现了这个脚本的调用时间。我有什么技巧可以将其变成持久连接？<​​/ p>

Now I can't simply save '$sock' as a $_SESSION variable and simply access it each time this script is called, I've found. Any tips on what I can do to turn this into a persistent connection?

推荐答案

正如您提供的链接所指出的那样，php是不是持久性语言，也无法跨会话保持持久性（即页面加载）。您可以通过运行第二个php脚本作为守护程序来创建中间立场，并使您的主脚本（即用户点击的脚本）连接到该脚本（是的-通过套接字...）并从中获取数据。

As the links you provided point out, php is not a persistent language and there is no way to have persistence across sessions (i.e. page loads). You can create a middle ground though by running a second php script as a daemon, and have your main script (i.e. the one the user hits) connect to that (yes - over a socket...) and get data from it.

如果要这样做，并且希望避免Web套接字的麻烦，请尝试使用新的HTML5 EventStream API ，因为它可以为您提供两全其美的功能：像基础设施这样的Commet，无需冗长的轮询或专门的Web套接字服务器。

If you were to do that, and want to avoid the hassel of Web Sockets, try the new HTML5 EventStream API, as it gives you the best of both worlds: A commet like infrastructure without the hackyness of long-polling or the need for a dedicated Web Sockets server.

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