Heroku上的memcached php会话

Question

I had noticed that an application I have setup on heroku only shows sessions variables on random requests when I refresh the browser. I put this down to the fact the application is running on 5 dynos.

I followed the following tutorial to solve this with memcached using memcachedcloud.

https://devcenter.heroku.com/articles/php-sessions#storing-sessions-in-memcached

The issue still remains though. I am using the PHP slim framework, is there any further config I need for this? I cant seem to find anything in the slim docs.

EDIT:

I can not produce the required composer.lock file because when running.

composer update

I get the error

The requested PHP extension ext-memcached * is missing from your system.

But it is in fact installed. I can see the version from typing.

memcached -h

But it is not present when typing

composer show --platform

Answer 1

Depending on what platform you're running, you have to make sure you that composer updates. Even if you have memcached installed, it has to match your PHP version. Then, once installed, run composer update

For example:

If you have PHP5.6.15, get memcached with, either, brew install php56/memcached or sudo apt-get install php56/memcached .

Then run composer update .

If you have an issue installing composer on Mac, you have to enable rootless install. More info can be found here:

https://donatstudios.com/OS-X-Mavericks-Memcached-PHP-Extension-Installation

The gist of the steps to take are:

• Restart computer and hold Command + R to get into recover mode
• Get into the terminal from Utilities
• Run csrutil disable and restart

This should be done prior to installing memcached from Homebrew.

Hope this helps.

Answer 2

I had a similar issue, where I was getting the same "ext-memcached * is missing" error and could not see ext-memcached when running composer show --platform .

I noticed that when I originally installed memcached, homebrew showed me various alternatives. So on Mac OSX El Capitan, I ended up installing the one that matched my PHP version:

brew install homebrew/php/php55-memcached

And then I had to add it to php.ini:

extension=/usr/local/Cellar/php55-memcached/2.2.0/memcached.so

You can get the correct version path with:

brew info php55-memcached

And then I restarted Apache:

sudo apachectl restart

It finally showed up in the composer list and I was able to update composer without error.