Javascript获得了php脚本的进展。

I need to provide interaction between js on html-page and php-script.
- Use AJAX.
Ok. But the problem is that php-script executing for a long time, and i need to know the state of this script processing (e.g. 60% complete)
What should i do? Create 2 php-scripts (client&server) and do ajax-request to client.php which will do requests to server.php via sockets or smth? Are there more elegant solutions?

我需要在html-page和php-script上提供js之间的交互。——使用AJAX。好的。但是问题是php脚本执行了很长时间，我需要知道这个脚本处理的状态(例如60%完成)，我应该做什么?创建两个php脚本(client&server)并对客户机执行ajax请求。php，用于对服务器进行请求。php通过套接字还是smth?有更优雅的解决方案吗?

6 个解决方案

#1

What if you had the script doing the processing write its status to a file once in awhile. Make a second script that will read the file and return the status of the original one.

如果让脚本执行处理，那么每隔一段时间将其状态写到文件中。创建第二个脚本，读取文件并返回原始文件的状态。

#2

You should never have a long-running process being executed entirely within an HTTP session.

您不应该让一个长期运行的进程在HTTP会话中完全执行。

A simple and common approach to this problem is message queuing. Basically, you have your UI queue up the request into a database table and then have external daemon(s) process the queue.

解决这个问题的一个简单而常见的方法是消息排队。基本上，您的UI将请求排队到数据库表中，然后让外部守护进程处理队列。

To provide feedback, have the daemon periodically update the table with the status for the row it's currently working on. Then, your javascript code can make AJAX requests to a script that retrieves the status for that work item from the database and displays it to the user.

为了提供反馈，让守护进程定期更新表，其中包含当前正在处理的行的状态。然后，javascript代码可以向脚本发出AJAX请求，该脚本从数据库中检索工作项的状态并将其显示给用户。

See: Dealing with long server-side operations using ajax?

参见:使用ajax处理长服务器端操作?

#3

Ajax call php script and return information that script is runing.
Ajax调用php脚本并返回脚本正在运行的信息。
Main script create lock.file.
主脚本创建lock.file。
Script called from cron is checking if lock.file exists and run the correct script.
从cron调用的脚本正在检查是否锁定。文件存在并运行正确的脚本。
The correct script saves the current progress into progress.txt.
正确的脚本将当前的进度保存到progress.txt中。
Ajax is reading progress.txt and when progress is 100% then return information that script processing is finished.
Ajax是阅读的进展。当进度为100%时，返回脚本处理完成的信息。

edited: Thanks to Justin for poiting the timeout problem ;)

编辑:感谢Justin提出超时问题;)

#4

If you want to be really fancy, write output from the php script to stdout, and capture it via a pipe. This would require running the php script using exec() or proc_open() (http://php.net/manual/en/function.proc-open.php) and pipe the output to a file (or if you want to be extra-extra fancy, use node.JS to listen for that data)

如果您想要更花哨，可以从php脚本编写输出到stdout，并通过管道捕获它。这将需要使用exec()或proc_open() () (http://php.net/manual/en/function.proc-open.php)运行php脚本，并将输出传输到一个文件(或者如果您希望更花哨，可以使用node)。监听数据)

There are quite a few ways to accomplish this:

有很多方法可以做到这一点:

Node.JS
node . js
An Ajax query every x seconds
每x秒有一个Ajax查询
A META/Javascript page reload
元/ Javascript加载页面
An iframe that is routinely reloading with the status in it.
一个iframe，它经常重新加载其中的状态。

Good luck!

好运！

#5

You could use PHP's output buffering (see ob_flush) to flush the contents at certain points in your script and tailor your JavaScript so that it uses the flushed contents. I believe readyState in your AJAX call won't be set to 4 on flushes so that's where you'll have to handle that yourself (see this article). I think its a much nicer way than writing to a file and checking the contents of that.

您可以使用PHP的输出缓冲(参见ob_flush)在脚本的某些位置刷新内容，并调整JavaScript，以便使用已刷新的内容。我相信AJAX调用中的readyState不会设置为4 on flushes，因此您必须自己处理这个问题(请参阅本文)。我认为这是一种更好的方式，而不是写到一个文件并检查它的内容。

#6

on your process.php:

在你process.php:

// 1st task
$_SESSION['progress'] = 0;

// your code for the first task here ...

// 2nd task
$_SESSION['progress'] = 10;

// you code for 2nd task ...

// 3rd task
$_SESSION['progress'] = 17;

// continue ...

// everything finished?
$_SESSION['progress'] = 100;

on your progress.php:

在你progress.php:

// simply output
echo $_SESSION['progress'];

now from your client-side, just make a request to your progress.php, receive the number and give it to your progress bar ...

现在，从您的客户端，对您的进度发出一个请求。php，收到号码并把它给你的进度条……

didn't check that by myself, but hope that it works! :)

我自己没有检查过，但希望它能起作用!:)

#1