continuous improvement in php projects

© 2010 Mayflower GmbH

Thorsten Rinne I 12. Oktober 2010International PHP Conference 2010

Continuous Improvement in PHP projects

Continuous Improvement in PHP projects I Mayflower GmbH I 12. Oktober 2010 I 2

Senior Developer / Team LeadHead of Open Source Labs

@MAYFLOWER GMBH

@ThorstenRinne

Topic:

Continuous Improvement in PHP projectes

Continuous Improvement in PHP projects I Mayflower GmbH I 12. Oktober 2010 I

Continuous integration?

4


Continuous inspection?

5


Why do we need continuous improvement?

6


„Continuous improvement is better than delayed

perfection” - Mark Twain

7


What exactly is Continuous improvement?

8


„A continuous improvement process is an ongoing effort to improve products, services, or

processes. These efforts can seek "incremental" improvement

over time or "breakthrough" improvement all at once.“

9

Wikipedia


Continuous Improvement~

KAIZEN

11


KAI=

Change

ZEN=

Good


Your Boss needs a will for changes!

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You need 3 steps for Continuous Improvement.

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1Continuous Improvement in PHP projects I Mayflower GmbH I 12. Oktober 2010 I 16

What are we trying to accomplish?

2Continuous Improvement in PHP projects I Mayflower GmbH I 12. Oktober 2010 I

How will we know that a change is an improvement?

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3Continuous Improvement in PHP projects I Mayflower GmbH I 12. Oktober 2010 I 18

What changes will result in improvements?

Plan

Act Check

Do



PLAN:How it should be?

20

Plan

Act Check

Do



DO:What and how do we do it?

22

Plan

Act Check

Do



CHECK:What did we achieve?

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Plan

Act Check

Do



ACT:What else do we have to do?

26

Plan

Act Check

Do



SCRUM


XP

Code

Release Plan

Iteration Plan

Acceptence Testing

Standup Meeting

Pair Negotiation

Unit Test

Pair Programming

Months

Weeks

Days

One day

hours

seconds

seconds


Conclusion:Combine Scrum, XP andContinuous Improvement

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Common problemsin PHP projects

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Code Aging


Technical Debt

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„Shipping first time code is like going into debt. A little debt speeds development so

long as it is paid back promptly with a rewrite... The danger occurs when the debt is not repaid. Every minute spent on not-quite-right code counts as interest on that

debt. Entire engineering organizations can be brought to a stand-still under the debt

load of an unconsolidated implementation, object-oriented or otherwise.“

34

Ward Cunningham, 1992

http://en.wikipedia.org/wiki/Interest

http://en.wikipedia.org/wiki/Interest

http://en.wikipedia.org/wiki/Object-oriented_programming

http://en.wikipedia.org/wiki/Object-oriented_programming


rising frequency

Dead end!

Benefit per Change Request

Costs per Change Request


Always improve your codebase!


PHP_CodeBrowser

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PHP Tool Support

38


What is PHP_CodeBrowser?

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I a code browser :-)

I syntax highlighting for PHP

I colored error sections found by PHP QA tools like•PHPUnit

•phpcpd

•PHP_CodeSniffer•Code Coverage

•PHPMD


How to get PHP_CodeBrowser?

I http://github.com/mayflowergmbh/PHP_CodeBrowser

I PHPUnit PEAR channel:

I Current version: 0.9.0

I We‘ll release PHP_CodeBrowser 1.0 this month!

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$ pear config-set preferred_state beta$ pear channel-discover pear.phpunit.de$ pear install --alldeps phpunit/PHP_CodeBrowser

http://github.com/mayflowergmbh/PHP_CodeBrowser

http://github.com/mayflowergmbh/PHP_CodeBrowser


PHP_CodeBrowser presentation

41


Cinder

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Why Cinder?

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I Integrate feedback directly

•static code analysis

•coding style

•unittests

I Decrease number of tools

I Based on existing artifacts from Continuous Integration

I Conform with IDE usabiliy guidelines


Cinder Features

I Eclipse Plugin

•Eclipse can be used for many languages

•Well documentated plugin infrastructure

I Reads Hudson or CruiseControl XML data

I Aggregates findings by the CI system

I Language of the project doesn‘t matter

I Periodic updates of input data

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How does Cinder work?

Continuous Integration

Server

45

Developer PC with Eclipse

periodically request from Cinder

CI data from CI server


How to install Cinder?

46


How to install Cinder?

47


How does Cinder look like?

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Cinder presentation

49


Padawan

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PHPMD

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PHPMD features

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I PHPMD looks for

•possible bugs

•suboptimal code

•overcomplicated expressions•unused parameters, methods, properties

I Latest release: 0.2.7


How to get PHPMD?

I PHPMD PEAR channel

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$ pear channel-discover pear.phpmd.org$ pear channel-discover pear.pdepend.org$ pear install --alldeps phpmd/PHP_PMD-alpha


How to use PHPMD?

55

univac:phpMyFAQ-2.7 thorsten$ phpmd phpmyfaq/inc/Link.php xml codesize

<?xml version="1.0" encoding="UTF-8" ?><pmd version="0.2.6" timestamp="2010-09-09T14:01:33+02:00"> <file name="/Users/thorsten/htdocs/phpMyFAQ-2.7/phpmyfaq/inc/Link.php"> <violation beginline="47" endline="627" rule="ExcessivePublicCount" ruleset="Code Size Rules" package="PMF_Link" externalInfoUrl="http://phpmd.org/rules/codesize.html#excessivepubliccount" class="PMF_Link" priority="3"> This class has a bunch of public methods and attributes </violation> <violation beginline="47" endline="627" rule="TooManyMethods" ruleset="Code Size Rules" package="PMF_Link" externalInfoUrl="http://phpmd.org/rules/codesize.html#toomanymethods" class="PMF_Link" priority="3"> This class has too many methods, consider refactoring it. </violation> ... </file></pmd>

http://phpmd.org/rules/codesize.html#excessivepubliccount




http://phpmd.org/rules/codesize.html#toomanymethods





Currently we‘re adding the Padawan rules to PHPMD.


How to get these tools?


phpmd.orggithub.com/mayflowergmbh

phpunit.deopensource.mayflower.de

58

http://www.phpmd.org

http://www.phpmd.org


Questions?

59

Thank you very much!

© 2010 Mayflower GmbH

Contact Thorsten [email protected]+49 89 242054-31

Mayflower GmbHMannhardtstr. 680538 München

mailto:[email protected]

mailto:[email protected]

continuous improvement in php projects

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continuous improvement

kaizen11continuous improvement

goodcontinuous improvement

incremental improvement

breakthrough improvement

scrumcontinuous improvement

continuous integration

continuous inspection