Google GDG DevFest 2013 PHP Web App on Google Cloud (Google App Engine) - By Bhavik Shah. Presented on 21st Sep 2013 in Pune, India

1. PHP Web Apps on Google Cloud
Bhavik Shah
Software Architect. Technologist. Evangelist.

2. Introduction

3. PaaS Clouds with PHP!

4. Google App Engine
Scalable, Reliable & Fast PaaS
* Experimental
PHP Support.

5. Why PHP?
Built for Web
Easy to Learn
Most Requested
<?php
echo "Hello World!";
?>
PHP
Frameworks
Rapid
Most popular
75% of Web is served by PHP
(as per Google)

6. Symbiotic relation
Google provides a great platform for PHP
PHP brings a popular language to Google.

7. PHP on App Engine
Image Courtesy: Google IO 2013

8. How to PHP?

9. Installation
Python 2.7
Google App Engine SDK 1.8.4
PHP (Thread Safe) 5.4
Remember:
Add each of it to your OS’s PATH variable.
URLs
http://www.python.org
https://developers.google.com/appengine/
http://php.net/downloads.php
Example installers (for Windows):
GoogleAppEngine-1.8.3.msi and php-5.4.17-Win32-VC9-x86.zip

10. Sign up
Google provides a great platform for PHP
PHP provides a language to Google.

11. Create application
Google provides a great platform for PHP
PHP provides a language to Google.

12. Creating application locally - 1
app.yaml
application: <your-app-id>
version: 1
runtime: php
api_version: 1
threadsafe: true
handlers:
- url: /assets
script: assets
- url: /.*
script: index.php
YAML

13. Creating application locally - 2
index.php
<?php
echo "Hello World!";
?>
PHP

14. Creating application locally - 3
php.ini
; php.ini
google_app_engine.enable_functions = "php_sapi_name,
php_uname, phpinfo"
INI

15. Creating application locally - 4
phpinfo.php
<?php
echo phpinfo();
?>
PHP

16. Deploying
Executing Application (Runs Locally)
dev_appserver.py --php_executable_path=
C:phpphp-cgi.exe <application id>
Update source to Google App Engine
appcfg.py update php-4-gae
Access on Google App Engine
http://<application id>.appspot.com/

17. Features

18. Cloud SQL
MySQL 5.5 in Cloud
Automatic Backups
Automatic replication
Geo-Located with App
Resource Limit
Maximum Request Size 16 MB
Maximum Response Size 16 MB
//PDO
$db = new PDO('mysql:unix_socket=/cloudsql/hello-php:my-cloudsql-instance;charset=utf8',
'<username>',
'<password>'
);
//mysql_connect
$conn = mysql_connect(":/cloudsql/hello-php:my-cloudsql-instance", "<username>",
"<password>");
//mysqli
$sql = new mysqli(null, "<username>", "<password>", null, null, "/cloudsql/hello-php:my-
cloudsql-instance");
PHP

19. Cloud Storage
Built in Stream Wrappers allowing use of
file api’s like file_get_contents();
$fp = fopen("gs://my_bucket/some_file.txt", "w");
fwrite($fp, "Hello");
fclose($fp);
$options = [ "gs" => [ "Content-Type" => "text/plain" ]];
$ctx = stream_context_create($options);
file_put_contents("gs://my_bucket/hello.txt", "Hello", 0, $ctx);
PHP

20. Functions disabled by default
Manual enabling possible via php.ini
gc_collect_cycles(), gc_enable() and gc_disable()
getmypid()
getmyuid()
getrusage()
getmyinode()
getmygid()
get_current_user()
libxml_disable_entity_loader()*
parse_str()
phpinfo()
phpversion()
PHP

21. Disabled Functions
Permanently disabled
disk_free_space()
diskfreespace()
escapeshellarg() and escapeshellcmd()
exec()
fsockopen()
link()
passthru()
popen(), proc_close(), prog_get_status(), proc_nice(), proc_open() and proc_terminate()
set_time_limit()
shell_exec()
show_source()
symlink()
system()
tmpfile()
tempnam()
PHP

22. Limits on PHP
Limit Amount
request size 32 megabytes
response size 32 megabytes
request duration 60 seconds
maximum total number of files (app files and static files) 10,000 total
1,000 per directory
maximum size of an application file 32 megabytes
maximum size of a static file 32 megabytes
maximum total size of all application and static files first 1 gigabyte is free
$0.13 per gigabyte per month after first 1 gigabyte
All database requests must finish within the HTTP request timer, around 60
seconds.
Offline requests like cron tasks have a time limit of 10 minutes.
Backend requests to Google Cloud SQL have a time limit of 10 minutes.

23. Other Services
Application Identity
Logs
Mail
MemCache
URL Fetch
User Authentication
Task Queues

24. Web App : URL Shortener
Use Bootstrap with PHP
Recommended: CodeIgnitor or Yii
Source Code available at https://github.com/bhavik1st/php-
4-gae
Web App on Google App Engine
http://php-4-gae.appspot.com/
$client = new Google_Client();
$service = new Google_UrlshortenerService($client); $taskDone = false;
if (isset($_GET['url']))
{
// Start to make API requests.
$url = new Google_Url(); $url->longUrl = $_GET['url'];
//Shorten URL
$shortUrl = $service->url->insert($url);
$taskDone = true;
}
PHP

25. Demo

26. References & Other details
developer.google.com
venturebeat.com
udemy.org
Disclaimer: All images & logos used in
the presentation are various trademarks
of respective organizations.
Other details
Code : https://github.com/bhavik1st/php-4-gae
Article: http://goo.gl/X7hbBI

27. Questions?

28. Thank you for your attention
Bhavik Shah
Twitter: bhavik1st
Email: bhavik1st@gmail.com
www.linkedin.com/in/bhavik1st