How to update the progress bar during a long cycle?

Question

How to update progress bar (html) during a long cycle (php-database export / import mysqli)

I don’t want to use a file or database to store temporary values ​​or the progression of the cycle, since this causes too many IOs to be used (and in the case of a file-based solution, the client often stops reading the file before the data has been written)

I looked at an event type situation, however, output buffering takes too much time to refresh the display.

Secondly, I looked at some of the methods that others have imposed on JavaScript markup in the browser, but this ends up with too much HTML being output (aka, 1,000,000 + records that are unloaded).

Basically, I am open to fresh ideas on how I can update the progress bar in a web browser, while in fact a very lengthy process is taking place in PHP (this is not upload file - I understand that there are extensions for PHP that allow for progress, however, it seems nothing happens to achieve progress in the server loop).

Any ideas? --- I really do not want to deviate from PHP / JavaScript / HTML to other platforms such as node.js / cocoa / etc.

Answer 1

You can clear your content as executing a script execution.

Here are some useful links to good code examples that might solve your problem:

• http://spidgorny.blogspot.com.br/2012/02/progress-bar-for-lengthy-php-process.html
• http://w3shaman.com/article/php-progress-bar-script
• http://pastebin.com/KSxjC01r
• http://www.php.net/manual/function.flush.php

: PHP script