phpandthecloud-vitochin

8/9/2019 PHPandTheCloud-VitoChin

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PHP and the CloudThe view from the bazaar

Vito Chin

June 2010


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About Me

Vito Chin

Software Engineer

Consultancy

Projects

Training, audits

Open-source:

Gmagick PHP Extension

Book

php|architect's Guide to PHP in the Cloud


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About this talk

Branch of Ivo Jansch's original PHP andthe Cloud

Co-author of php|architect's Guide to PHPin the Cloud

This talk focuses on available open-sourcetools within PHP; in extensions and inuserland.


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PHP

Standing on the shoulders of open-sourcegiants:


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PHP

Used by many


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Cloud


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Cloud

Gartner's Hype Cycle


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Cloud

Gartner's Hype Cycle


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Cloud

Cloud computing is a model for enabling convenient, on-demandnetwork access to a shared pool of configurable computing

resources (e.g., networks, servers, storage, applications, and

services) that can be rapidly provisioned and released withminimal management effort or service provider interaction.

This cloud model promotes availability and is composed of fiveessential characteristics, three service models, and four

deployment models.

http://csrc.nist.gov/groups/SNS/cloud-computing/


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Cloud

Cloud computing is a model for enabling convenient, on-demandnetwork access to a shared pool of configurable computing




deployment models.



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PHP and the Cloud

Convenient network accessCURL extension

Connect and communicate to many different types of

servers http, https, ftp, gopher, telnet, dict, file, and ldap

protocols

Most prevalent within the cloud: HTTP

RESTful services (POST, GET, PUT, DELETE)


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PHP and the Cloud

Convenient network accessCURL extension

$ch = curl_init();

curl_setopt($ch, CURLOPT_URL,"http://api.cloudphp.net/");curl_setopt($ch, CURLOPT_HEADER, false);curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);

$content = curl_exec($ch);

curl_close($ch);


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PHP and the Cloud

Convenient network accessSOAP extension

SoapClient, SoapServer

Simple Object Access Protocol

WSDL: Web Services Description Language

$hello = new SoapClient("http://api.cloudphp.net/Hello.wsdl");$hello->sayHello("world");


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Cloud

Cloud computing is a model for enabling convenient, on-demandnetwork access to a shared pool ofconfigurable computing




deployment models.



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PHP and the Cloud

Configurable computing resourcesUsually, requests sent as POST

Obtain options available

XML with SimpleXML or DOM extension

$xml = simplexml_load_string($content);$title = $xml->book["title"];$title = $xml->book["pages"];


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PHP and the Cloud

Configurable computing resourcesJSON extension

json_encode() / json_decode()

Javascript Object Notation

Very popular interchange format: More compact

Interpret-able by Javascript AJAX requests


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PHP and the Cloud

Configurable computing resourcesJSON extension

{ "book":{"title":"PHP in the Cloud","pages":"100"

}}

$json = json_decode($jcontent);echo $json->book->title;echo $json->book->pages;


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Cloud service models

NIST states 3:Infrastructure as a Service

Platform as a Service

Software as a Service


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Infrastructure as a Service

Typically VM instances

Choice of OS

Freedom within the OS Some custom network features

Instances controlled via API

Specialised or custom Machine Images


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Infrastructure as a Service

Publicly available examples:Amazon Elastic Compute Cloud

Rackspace Cloud Servers

Microsoft Azure

PHP API provided by each vendor

Open source PHP alternatives are abundant(and sometimes better!)


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PHP and IaaS scenario

Bottlenecks: The IaaS cloud is not a silverbullet


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Identifying bottlenecks (xdebug)


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Bottleneck resolution


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Cloud Advantages:Low-cost scalability

Economies of scale

Capital expense to operational expense

Utility-like flexibility


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Platform as a Service

A platform to deploy your application

Scales up and down automatically

Convenient tools and servicesMemcacheMail

Image Processing

Authentication & Authorisation

Task queues


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PHP and Google AppEngine

Range of scalable services

Officially support only:


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PHP developers are not really missing outon features on the GAE.

The question to ask: How important isGoogle's scalability to your application?

?


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Pseudo-PHP via Quercus

Java implementation

Needs to keep up with PHP changes


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Pseudo-PHP via QuercusLacks community involvement:

PHP core and PECL community consists of a large

band of contributors from around the world Open-source solutions provided by the community

(such as extensions) are well embraced

Many extensions not available


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PHP and Rackspace Sites

PHP support (but not too perfect)

Automatic scalability

Virtual local storage routed to Cloud files


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PHP and Rackspace Sites

Downside:No instant control over supported version

Unsuitable for custom requirements No shell access

Not able to build custom libraries

No API


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Software as a Service

GUI and APIGoogle Apps

Salesforce

Twitter

Google Maps

Google Search

API Only: PayflowPro

There is a PHP wrapper for that

Almost always:


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PHP for SaaS

PHP's Bread and Butter

Architectural considerations

Multi-tenancy Be careful:

Reliability

SecurityDeployment

Maintenance


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PHP for the Cloud

Compatible philosophiesNot a binary Fort

X


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PHP for the Cloud

Compatible philosophiesThe Unix Philosophy: Write programs that do

one thing and do it well. Write programs to

work together. Write programs to handle textstreams, because that is a universal interface.


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What PHP is?

Do one thing and do it wellAn easier interface (wrapper) to C (and other)

libraries

Rails is like a rounded rectangle and PHP is like a ball of nails.

Terry Chay


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What PHP is?

Work togetherExtensions

Gmagick GraphicsMagick

CURL libcurl memcached libmemcached

See pecl.php.net

Web servers httpd

Browsers and UIs (e.g. GTK)


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Credits and sources

Photos and Images

Gartner's Hype Cycle illustrative diagram on slide 7 & 8 by Jeremy Kemp on Wikipedia

Trees on slide 18 by Gerald_G on http://www.openclipart.org/

Cachegrind generated 22 from xdebug (by Derick Rethans) used to generate visualisation

created with xdebugtoolkit and dot

Rack on slide 28 by Steve Jurvetson. Source: http://flickr.com/photos/jurvetson/157722937/

Fort on slide 34 by Jan F. on Wikipedia

UNIX License plate on slide 35 from http://www.unix.org/

Old images on slide 28, 30, 33 from http://www.oldbookillustrations.com

All other organisational logos are trademark of the respective organisations


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