Php and webservices
- 1. PHP and Web Services Bruno Pedro <[email protected]> CITOT - May 20th 2007
- 2. PHP andWeb Services Summary • What is PHP? • Web Services • SOAP • REST • JSON • Conclusions 2
- 3. PHP andWeb Services 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 3
- 4. PHP andWeb Services How is PHP used? • Content Management • Forums • Blogging • Wiki • CRM 4
- 5. PHP andWeb Services Who uses PHP? Source: Zend 5
- 6. PHP andWeb Services 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 6
- 7. PHP andWeb Services The PHP language 7 Easy syntax!
- 8. PHP andWeb Services Creating a function 8 function declaration return value function call
- 9. PHP andWeb Services Creating a class 9 class declaration public method method call
- 10. PHP andWeb Services Web Services 10 Source:The Server Side (http://tinyurl.com/38umxt)
- 11. PHP andWeb Services What are Web Services? • Interoperable interactions • Calls are made over a network • Lots of different standards • Popular Web sites use them 11
- 12. PHP andWeb Services Requirements • PHP 5.2.2 • SOAP • simplexml • DOM • JSON 12
- 13. PHP andWeb Services SOAP Source: Prentice Hall (http://tinyurl.com/33dcch) 13
- 14. PHP andWeb Services SOAP • Simple Object Access Protocol • Usually an HTTP POST request • Call is encapsulated in XML • Response is an XML document • PHP handles everything 14
- 15. PHP andWeb Services Server implementation 15 namespace start a server assign a class handle incoming calls
- 16. PHP andWeb Services Client implementation 16 namespace endpoint display result
- 18. PHP andWeb Services SOAP 18 • Support for SOAP 1.1, 1.2 and WSDL 1.1 • Handles simple and complex types • Very easy implementation • Output is quite bulky
- 19. PHP andWeb Services REST http://example.com/calculator/sum/?x=121&y=233 GET PUT POST DELETE «interface» Resource GET - perform a calculation PUT - not used POST - not used DELETE - not used /calculator/sum/ 19
- 20. PHP andWeb Services 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 20
- 21. PHP andWeb Services Server implementation 21 handle incoming call create an XML document add elements output result
- 22. PHP andWeb Services Client implementation 22 endpoint arguments load XML document output result
- 24. PHP andWeb Services REST 24 • Interaction needs to be implemented • XML schema must be know beforehand • Complex types not handled natively • Output is usually RSS
- 25. PHP andWeb Services JSON 25 JSON Logo Source: json.org
- 26. PHP andWeb Services 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 26
- 27. PHP andWeb Services Server implementation 27 handle incoming call generate result output JSON string
- 28. PHP andWeb Services Client implementation 28 endpoint arguments output result
- 30. PHP andWeb Services JSON 30 • REST approach • Handles simple and complex types • Calls can be made with AJAX • Can also be used on the server side
- 31. PHP andWeb Services 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 31
- 33. PHP andWeb Services Resources 33 • 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/