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Hello!

Lone Star PHP 2015

Hash Tag: #lsp15�Joind.in: https://joind.in/13554

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Who I am?�Name: Cory�Twitter: @ckdarby�

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Serial Legacy Killer

My Approach on going from Legacy -> Modern

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Background

  • Code bases +500,000 lines
  • They are usually 5-10 years old

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  • Billions of rows in the tables
  • Terabytes of data in the databases

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  • +100 payment transactions/sec
  • +800 http requests/second

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Legacy -> Modern

2.

Educate & Enforce

3.

Refactor

1.

Convince others

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Legacy -> Modern

2.

Educate & Enforce

3.

Refactor

1.

Convince others

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1.

Convince Others

Code might not argue with you but co-workers will.

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Clarify

There is a Problem

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Clarify

There is a Problem

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I'd actually prefer if we didn't spend too much time on this. I know you were looking to make things easier, but there's likely more important things that would be better for you to work on.

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Boss at [redacted]

“

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Explain

The Value

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Code Trumps

Everyone�Everything

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2.

Educate & Enforce

Only as strong as the weakest link

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Lead

By Example

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Measure

Metrics

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3.

Refactor

Not much to add here...

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Do not

Reinvent The Wheel

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Available Online Talks

Adam Culp

Refactoring 101

Paul Jones

Steps Toward Modernizing a Legacy Codebase

Michael Peacock

Refactoring to Symfony Components

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Books

Martin Fowler

Refactoring: Improving the Design of Existing Code

Paul Jones�Modernizing Legacy Applications In PHP

Steve McConnell

Code Complete

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Shameless Project Plugs

  • DUnit
  • SnappyRouter (Far more than a router)
  • Pho

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The End!

Q&A Time

You can find me at:

@ckdarby

ckdarby@gmail.com