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Home Backend Development PHP Tutorial javascript - php实现后台运行,运行结束后并通知前台反馈。

javascript - php实现后台运行,运行结束后并通知前台反馈。

Jun 06, 2016 pm 08:07 PM
html5 javascript node.js php shell

目前使用php执行脚本,但是在前台页面如果关闭的话,会终止脚本执行,所以希望切换到后台运行

还有一种可以在前台运行,但是提供运行进度,比如目前实时更新执行状态,比如已经执行到80%,然后到100%完成后提示完成信息。

举个列子,比如实现视频转码,目前正在转码,然后希望在后台转码,不影响前台操作。
另外一种占用前台操作,但是可以告诉前台目前还在转码,还有多少没转码。

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目前使用php执行脚本,但是在前台页面如果关闭的话,会终止脚本执行,所以希望切换到后台运行

还有一种可以在前台运行,但是提供运行进度,比如目前实时更新执行状态,比如已经执行到80%,然后到100%完成后提示完成信息。

举个列子,比如实现视频转码,目前正在转码,然后希望在后台转码,不影响前台操作。
另外一种占用前台操作,但是可以告诉前台目前还在转码,还有多少没转码。

视频转码,耗时较长,不应该阻塞PHP-FPM进程,所以应该另开一个进程异步处理:
pclose(popen('php /path/to/task.php &', 'r'));
脚本task.php里调用Linux命令mencoder/ffmpeg/imagemagick(convert)处理多媒体文件,
并在数据库任务表里插入一条数据,用来记录任务的状态进度,供前端AJAX检查.

1、转码服务是一个进程,提供2个接口功能(a:接受转码请求并处理,b:查询转码进度)
2、前端调用这2个接口即可。

针对这两种。后台进行执行的,我所了解到的就是创建一张数据表,比如视频转码,发送邮件等,要执行对应的操作的时候向数据库插入数据,然后编写一个定时任务去后台完成相关操作

在前台执行并显示进度条,将每一次的操作当成一步,算出共多少步,涉及到的就比较多了

后台异步可以用Swoole扩展。
至于进度可以用数据库或者redis之类的进行通信,比如进度每过5%,更新一下数据库/redis, 前台则是每10秒查询一次最新状态,这样的。

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