PHP and Web Services

PHP and Web Services CITOT - May 20th 2007 Bruno Pedro <bpedro@computer.org>

Summary • What is PHP? • Web Services • SOAP • REST • JSON • Conclusions PHP and Web Services 2

What is PHP? • PHP: Hypertext Preprocessor • Open Source Web scripting language • Created in 1994 • Syntax inherited from C, Java and Perl • Powerful, yet easy to learn PHP and Web Services 3

How is PHP used? • Content Management • Forums • Blogging • Wiki • CRM PHP and Web Services 4

Who uses PHP? Source: Zend PHP and Web Services 5

Why use PHP? • Used by 20M+ Web Sites around the globe • Community-maintained documentation • Code runs on UNIX, OSX and Windows • Backed commercially by Zend • Easy syntax PHP and Web Services 6

The PHP language Easy syntax! PHP and Web Services 7

Creating a function function declaration return value function call PHP and Web Services 8

Creating a class class declaration public method method call PHP and Web Services 9

Web Services Source:The Server Side (http://tinyurl.com/38umxt) PHP and Web Services 10

What are Web Services? • Interoperable interactions • Calls are made over a network • Lots of different standards • Popular Web sites use them PHP and Web Services 11

Requirements • PHP 5.2.2 • SOAP • simplexml • DOM • JSON PHP and Web Services 12

SOAP Source: Prentice Hall (http://tinyurl.com/33dcch) PHP and Web Services 13

SOAP • Simple Object Access Protocol • Usually an HTTP POST request • Call is encapsulated in XML • Response is an XML document • PHP handles everything PHP and Web Services 14

Server implementation namespace start a server assign a class handle incoming calls PHP and Web Services 15

Client implementation namespace endpoint display result PHP and Web Services 16

Output namespace result PHP and Web Services 17

SOAP • Support for SOAP 1.1, 1.2 and WSDL 1.1 • Handles simple and complex types • Very easy implementation • Output is quite bulky PHP and Web Services 18

REST «interface» /calculator/sum/ Resource GET - perform a calculation GET PUT - not used PUT POST - not used POST DELETE - not used DELETE http://example.com/calculator/sum/?x=121&y=233 PHP and Web Services 19

REST • Representational State Transfer • Usually an HTTP GET request • Call is made through GET parameters • Response is an XML document • Create response with DOM • Interpret response with simplexml PHP and Web Services 20

Server implementation handle incoming call create an XML document add elements output result PHP and Web Services 21

Client implementation endpoint arguments load XML document output result PHP and Web Services 22

Output result PHP and Web Services 23

REST • Interaction needs to be implemented • XML schema must be know beforehand • Complex types not handled natively • Output is usually RSS PHP and Web Services 24

JSON JSON Logo Source: json.org PHP and Web Services 25

JSON • JavaScript Object Notation • REST approach • Except response is not XML • Used on the client side • Create response with json_encode() • Interpret response in JavaScript PHP and Web Services 26

Server implementation handle incoming call generate result output JSON string PHP and Web Services 27

Client implementation endpoint arguments output result PHP and Web Services 28

Output result PHP and Web Services 29

JSON • REST approach • Handles simple and complex types • Calls can be made with AJAX • Can also be used on the server side PHP and Web Services 30

Conclusions • PHP is a powerful web scripting language • Too many Web Services standards • PHP handles all the internals • REST requires more coding than SOAP • Use JSON for client side applications • XML-RPC support is still experimental PHP and Web Services 31

Questions? PHP and Web Services 32

Resources • My blog: http://unfoldingtheweb.com/ • PHP Manual: http://www.php.net/ • SOAP: http://www.w3.org/TR/soap/ • REST: http://tinyurl.com/akhc7 • JSON: http://www.json.org/ PHP and Web Services 33

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PHP and Web Services

by Bruno Pedro on May 20, 2007

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PHP and Web Services — Presentation Transcript