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Php and webservices
- 1. PHP and WebServices Bruno Pedro <bpedro@computer.org> CITOT - May 20th 2007
- 2. PHP andWeb Services Summary •What is PHP? • Web Services • SOAP • REST • JSON • Conclusions 2
- 3. PHP andWeb Services Whatis 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 Howis PHP used? • Content Management • Forums • Blogging • Wiki • CRM 4
- 5. PHP andWeb Services Whouses PHP? Source: Zend 5
- 6. PHP andWeb Services Whyuse 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 ThePHP language 7 Easy syntax!
- 8. PHP andWeb Services Creatinga function 8 function declaration return value function call
- 9. PHP andWeb Services Creatinga class 9 class declaration public method method call
- 10. PHP andWeb Services WebServices 10 Source:The Server Side (http://tinyurl.com/38umxt)
- 11. PHP andWeb Services Whatare 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 Serverimplementation 15 namespace start a server assign a class handle incoming calls
- 16. PHP andWeb Services Clientimplementation 16 namespace endpoint display result
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- 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 Serverimplementation 21 handle incoming call create an XML document add elements output result
- 22. PHP andWeb Services Clientimplementation 22 endpoint arguments load XML document output result
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- 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 JSONLogo 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 Serverimplementation 27 handle incoming call generate result output JSON string
- 28. PHP andWeb Services Clientimplementation 28 endpoint arguments output result
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- 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
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- 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/