PHP可以异步使用套接字？ [英] Can PHP asynchronously use sockets?

问题描述

典型的PHP接口的功能是同步的，并等待传入​​连接和数据时停止该线程。 （如： socket_read 并 socket_listen ）

Typical PHP socket functionality is synchronous, and halts the thread when waiting for incoming connections and data. (eg. socket_read and socket_listen)

我如何做同样的异步？这样我就可以对数据做出反应接收数据的事件，而不是轮询数据等。

How do I do the same asynchronously? so I can respond to data in a data received event, instead of polling for data, etc.

推荐答案

是啊，这就是 socket_set_nonblock（）是。您的插座互动code将需要以不同的写入，兼顾特殊含义的错误codeS 11， EWOULDBLOCK 和115 EINPROGRESS ，假设

Yup, that's what socket_set_nonblock() is for. Your socket interaction code will need to be written differently, taking into account the special meanings that error codes 11, EWOULDBLOCK, and 115, EINPROGRESS, assume.

下面是从PHP同步插座轮询循环有所一些，虚构样本code，根据要求：

Here's some somewhat-fictionalized sample code from a PHP sync socket polling loop, as requested:

$buf = '';
$done = false;
do {
    $chunk = socket_read($sock, 4096);
    if($chunk === false) {
        $error = socket_last_error($sock);
        if($error != 11 && $error != 115) {
            my_error_handler(socket_strerror($error), $error);
            $done = true;
        }
        break;
    } elseif($chunk == '') {
        $done = true;
        break;
    } else { 
        $buf .= $chunk;
    }
} while(true);

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