在 PHP 中使用 fsockopen() 和 fgets() 时， while() 循环如何不停止？

发布于 2024-08-14 03:19:50 字数 397 浏览 9 评论 0原文

这是小型 PHP IRC 机器人的基本连接代码。问题是，在从 IRC 服务器接收到数据之前，while() 循环似乎不会超出 fgets() 的范围。我希望 while() 循环能够迭代，无论 IRC 服务器是否尚未发送数据。这可能吗？

$socket = fsockopen($config['irc_server'], $config['port']);
while (1) 
{
    $data = fgets($socket, 128);
    echo '[RECEIVE] ' . $data;
    $recv = explode(' ', $data);

    if ($recv[0] == 'PING')
    {
        send('PONG', $recv[1]);
    }
}

原文

This is the basic connection code for a small PHP IRC bot. The problem is that it seems that the while() loop does not progress beyond fgets() until it receives data from the IRC server. I want the while() loop to iterate regardless if the IRC server has not yet sent data. Is this possible?

$socket = fsockopen($config['irc_server'], $config['port']);
while (1) 
{
    $data = fgets($socket, 128);
    echo '[RECEIVE] ' . $data;
    $recv = explode(' ', $data);

    if ($recv[0] == 'PING')
    {
        send('PONG', $recv[1]);
    }
}

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原谅我要高飞 2024-08-21 03:19:50

查看 socket_* 函数，包括以下函数：

socket_set_nonblock

您还可以将非块标志传递给 socket_recv

这是强制性的快速和肮脏的示例（没有错误检查）

/* Create a TCP/IP socket. */
$socket = socket_create(AF_INET, SOCK_STREAM, SOL_TCP);
$result = socket_connect($socket, $address, $service_port);
while (false === ($bytes = socket_recv($socket, $buf, 2048, MSG_DONTWAIT))) 
{ /* do stuff while waiting for data */ }

Check out the socket_* functions including this one:

socket_set_nonblock

You can can also pass a non-block flag to socket_recv

Here is the obligatory quick and dirty example (no error checking)

/* Create a TCP/IP socket. */
$socket = socket_create(AF_INET, SOCK_STREAM, SOL_TCP);
$result = socket_connect($socket, $address, $service_port);
while (false === ($bytes = socket_recv($socket, $buf, 2048, MSG_DONTWAIT))) 
{ /* do stuff while waiting for data */ }

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巾帼英雄 2024-08-21 03:19:50

看看ftell。这是 php 文档中的相关示例：

#!/usr/bin/php4 -q
<?
#following will hang if nothing is piped:
#$sometext = fgets(STDIN, 256)

$tell = ftell(STDIN);

if (is_integer($tell)==true) 
  {echo "Something was piped: ".fread(STDIN,256)."\n";}
else 
  {echo "Nothing was piped\n";}

?>

Take a look at ftell. Here is a related example from the php documentation:

#!/usr/bin/php4 -q
<?
#following will hang if nothing is piped:
#$sometext = fgets(STDIN, 256)

$tell = ftell(STDIN);

if (is_integer($tell)==true) 
  {echo "Something was piped: ".fread(STDIN,256)."\n";}
else 
  {echo "Nothing was piped\n";}

?>

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