I installed Heroku on Wordpress by using the guidelines from https://github.com/mhoofman/wordpress-heroku. The system works fine. Only when I try to install plugins I receive the error message
Abort class-pclzip.php : Missing zlib extensions.
The error message is clear, zlib missing. I was just wondering if anyone of you had the same issue and can provide some best practices how to solve the problem?
It seems that heroku does not allow you to create files and you have to extract plugins and themes locally inside their folders respectively and push your changes back to your heroku repository. From the wordpress-heroku documentation:
Because a file cannot be written to Heroku's file system, updating and installing plugins or themes should be done locally and then pushed to Heroku.