异步API中调用PHP [英] Asynchronous API calls in PHP

问题描述

我有需要做三个独立的API调用，合并结果的PHP脚本，并把它输出给用户。

I have a PHP script that needs to make three separate API calls, combine the results, and output it for the user.

的问题是，每个API调用大约需要5秒钟来执行。用3 API调用在每5秒，它需要约15秒来执行脚本。

The problem is that each API call takes about 5 seconds to execute. With 3 API calls at 5 seconds each, it take about 15 seconds to execute the script.

有没有办法，我能以某种方式启动三个API的方式同时通话，一旦最后一个完成后，合并的结果？如果可能的话我可能减少的时间长度从15到5秒，极大地提高了我的用户体验。

Is there a way that I can somehow start the three API calls simultaneously and once the last one finishes, combine the results? If that's possible I could potentially reduce the length of time from 15 to 5 seconds, dramatically improving my user's experience.

我研究了PHP的异步函数调用，但似乎没有被很多很好的选择。我希望有人在那里已经有类似的情况，发现了一个优雅的方式来处理这个问题。

I researched asynchronous function calls in PHP, but there doesn't seem to be a lot of good options. I'm hoping that someone out there has been in a similar situation and found an elegant way to handle this.

推荐答案

自己的PHP脚本是单线程的。有办法在PHP中使用 pcntl_fork 功能叉的子进程。但据我所知，这只有真正的CLI SAPI效果很好。与任何Web服务器SAPI的，无论是它的越野车还是不支持。

PHP scripts by themselves are single threaded. There are ways to "fork" child processes in PHP using pcntl_fork function. But as far as I know, this only really works well with the CLI sapi. With any of the web server sapi's, either it's buggy or not supported.

如果你有一个来自Web请求启动它，你可以尝试使用了shell_exec 产卵主在后台PHP CLI过程（追加＆安培; 末），然后利用pcntl_fork的瓜分工作

If you have to initiate it from a web request, you could try using shell_exec to spawn a master PHP CLI process in the background (append & at the end), and then make use of pcntl_fork to divide up the work.

如果你只是等待Web请求，我会按照使用的 curl_multi 功能。但是，如果正确使用分叉可以，如果你有其他的密集型任务是有用的。

If you're just waiting on web requests, I would follow Dagon's suggestion of using the curl_multi functions. But forking can be useful if you have other intensive tasks, if used correctly.

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