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一个 PHP 脚本可以启动另一个 PHP 脚本并退出吗？

发布于 2025-01-13 21:57:23 字数 86 浏览 4 评论 0原文

PHP 脚本如何启动另一个 PHP 脚本，然后退出，让另一个脚本继续运行？

另外，第二个脚本有什么方法可以在到达特定行时通知 PHP 脚本吗？

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掌心的温暖 2025-01-20 21:57:26

如果您不想构建 pcntl 扩展，那么一个好的替代方法是使用 proc_open()。

http://www.php.net/manual/en/function。 proc-open.php

将其与stream_select() 一起使用，以便您的PHP 进程可以休眠，直到您创建的子进程发生某些情况。

这将有效地在后台创建一个进程，而不会阻塞父 PHP 进程。 PHP 可以读取和写入 STDIN、STDOUT、STDERR。

要使浏览器完成加载（停止加载进度指示器），您可以使用 Milan Babuškov 提到的内容。

让浏览器认为HTTP请求完成的关键是向其发送内容长度。为此，您可以开始缓冲请求，然后在发送 Content-Length 标头后刷新它。

例如：

<?php

ob_start();

// render the HTML page and/or process stuff

header('Content-Length: '.ob_get_length());
ob_flush();
flush();

// can do more processing

?>

If you don't want to build the pcntl extension, then a good alternative is to use proc_open().

http://www.php.net/manual/en/function.proc-open.php

Use that together with stream_select() so your PHP process can sleep until something happens with the child process you created.

That will effectively create a process in the background, without blocking the parent PHP process. You PHP can read and write to STDIN, STDOUT, STDERR.

To make the browser complete loading (stop the load progress indicator) then you can use what Milan Babuškov mentioned.

The key to making the browser think the HTTP request is complete, is to send it the content length. To do this you can start buffering the request, then flush it after you send the Content-Length header.

eg:

<?php

ob_start();

// render the HTML page and/or process stuff

header('Content-Length: '.ob_get_length());
ob_flush();
flush();

// can do more processing

?>

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红ご颜醉 2025-01-20 21:57:26

您可以创建请求并在写入完成后立即关闭连接。

查看 http://drupal.org/project/httprl 中的代码，可以做到这一点（非阻塞要求）。我计划在完善这个库后将其推送到 github；可以在 drupal 之外运行的东西。这应该可以满足您的需求。

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莳間冲淡了誓言ζ 2025-01-20 21:57:25

以下是具体操作方法。您告诉浏览器读取输出的前 N 个字符，然后关闭连接，而您的脚本将继续运行直到完成。

<?php
ob_end_clean();
header("Connection: close");
ignore_user_abort(); // optional
ob_start();
echo ('Text the user will see');
$size = ob_get_length();
header("Content-Length: $size");
ob_end_flush();     // Will not work
flush();            // Unless both are called !

// At this point, the browser has closed connection to the web server

// Do processing here
include('other_script.php');

echo('Text user will never see');
?>

Here's how to do it. You tell the browser to read in the first N characters of output and then close the connection, while your script keeps running until it's done.

<?php
ob_end_clean();
header("Connection: close");
ignore_user_abort(); // optional
ob_start();
echo ('Text the user will see');
$size = ob_get_length();
header("Content-Length: $size");
ob_end_flush();     // Will not work
flush();            // Unless both are called !

// At this point, the browser has closed connection to the web server

// Do processing here
include('other_script.php');

echo('Text user will never see');
?>

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深居我梦 2025-01-20 21:57:25

您可以通过分叉然后调用 包括或需要。

parent.php:

<?php

    $pid = pcntl_fork();
    if ($pid == -1) {
        die("couldn't fork");
    } else if ($pid) { // parent script
        echo "Parent waiting at " . date("H:i:s") . "\n";
        pcntl_wait($status);
        echo "Parent done at " . date("H:i:s") . "\n";
    } else {
        // child script
        echo "Sleeper started at " . date("H:i:s") . "\n";
        include('sleeper.php');
        echo "Sleeper done at " . date("H:i:s") . "\n";
    }

?>

sleeper.php:

<?php
sleep(3);
?>

输出：

$ php parent.php
Sleeper started at 01:22:02
Parent waiting at 01:22:02
Sleeper done at 01:22:05
Parent done at 01:22:05

但是，分叉本质上不允许任何进程间通信，因此您必须找到其他方法来通知父级子级已到达特定行，就像您在的问题。

You can effectively achieve this by forking and then calling include or require.

parent.php:

<?php

    $pid = pcntl_fork();
    if ($pid == -1) {
        die("couldn't fork");
    } else if ($pid) { // parent script
        echo "Parent waiting at " . date("H:i:s") . "\n";
        pcntl_wait($status);
        echo "Parent done at " . date("H:i:s") . "\n";
    } else {
        // child script
        echo "Sleeper started at " . date("H:i:s") . "\n";
        include('sleeper.php');
        echo "Sleeper done at " . date("H:i:s") . "\n";
    }

?>

sleeper.php:

<?php
sleep(3);
?>

Output:

$ php parent.php
Sleeper started at 01:22:02
Parent waiting at 01:22:02
Sleeper done at 01:22:05
Parent done at 01:22:05

However, forking does not inherently allow any inter-process communication, so you'd have to find some other way to inform the parent that the child has reached the specific line, like you asked in the question.

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