PHP was added to the languages offered by Google App Engine about a year ago. This session will focus on porting an existing app on gae. We’ll start talking about the main characteristics of the app engine platform, which kind of services are available (persistence, storage, queue and so on) and how to use it. Then the PHP installation of app engine will be discussed, highlighting implementation choices and limitations. The second part of the talk will go into implementation details in particular about what tweaks are needed to run an existing app on gae e.g: how session is managed, logging is performed and how to interact with the file system not forgetting about deploy

1. Deploy !
a PHP Application!
on Google App Engine

2. Who am I?
Michele Orselli!
CTO@Ideato!
!
@_orso_!
mo@ideato.it

3. Titolo Testo
PHP for App Engine
https://developers.google.com/events/io/sessions/333055646

4. The GAE platform
Platform as A Service (PaaS)!
Build, deploy & scale!
Don’t care about infrastructure
https://appengine.google.com/
https://developers.google.com/appengine/

5. Google App Engine: services
All PaaS have limitations!
PHP is in preview phase!
Not all services are available
https://developers.google.com/appengine/features

6. Google App Engine: data storage
Google Cloud Sql !
Memcache!
Google Cloud Storage

7. Google App Engine: ext services
Email (internal or SendGrid)!
Twilio!
UrlFetch

8. Google App Engine: offline work
TaskQueue!
Cron

9. Google App Engine: auth
User Auth!
Application Identity

10. Titolo Testo
PHP on GAE

11. PHP 5.4!
Runs in a sandbox
https://developers.google.com/appengine/docs/php/
PHP on GAE

12. Some well-know extension are
disabled: imagick, intl, pcntl, curl
PHP on GAE

13. Some well-know extension are
disabled: imagick, intl, pcntl, curl
PHP on GAE
whaaat?

14. Some function are disabled!
permanently: exec, tmpfile!
partially: /e on preg_replace!
softly: gc_*, parse_str
PHP on GAE

15. File System is Read only: you can
store files on Cloud Storage or
external services
PHP on GAE

16. PHP on GAE

17. Cannot invoke external services
directly (no curl remember? :-P)
PHP on GAE

18. PHP on GAE

19. Dynamic response max 32 MB!
Timeout on long response
PHP on GAE

20. Sessions are stored on Memcache !
session_*, $_SESSION work as expected!
use session_set_save_handler to change
handler
PHP on GAE

21. Log are managed via syslog!
use syslog function!
use custom logging lib (eg. Monolog)
PHP on GAE

22. PHP on GAE

23. get the sdk!
requirements: python 2.7, php-cgi, mysql?!
local web server
wget https://storage.googleapis.com/appengine-sdks/featured/google_appengine_1.9.4.zip
App Engine SDK

24. # app.yaml
application: propane-forge-391
version: 1
runtime: php
api_version: 1
threadsafe: true
Base Config

25. # app.yaml
application: propane-forge-391
version: 2
runtime: php
api_version: 1
threadsafe: true
Base Config

26. # app.yaml — continued
handlers:
- url: /css
static_dir: web/css
- url: /js
static_dir: web/js
- url: .*
script: web/index.php
Base Config

27. # php.ini
google_app_engine.enable_functions = “…”
Base Config

28. !
dev_appserver.py --php_executable_path=/usr/bin/php-cgi /
var/www/todo/
Test Locally

29. Deploy
!
appcgf.py update /var/www/todo/!
(or git push)

30. show me the code!
https://github.com/ideatosrl/silex-todo-gae

31. That’s all folks
Thank you!
@_orso_ mo@ideato.it