Making Frameworks
Suck Less
terry chay
International PHP Conference, Berlin
2009-05-26T09:00+200

Roadmap Introduction

Where I’m coming from

Terry Chay goes to Zendcon
Not about making
frameworks suck
less
…so much as
why frameworks
suck.

PHP Coding Web Development OOP
Engine g11n - What is a design pattern?
- What are differences between PHP4 - What is the difference between -- why is it not an algorithm?
and PHP5? i18n and l10n? -- why use patterns at all?
- How does PHP4 handle objects - How would you solve that -- Example
strangely? architecturally? -- what is a \"consequence\" mean?
-- How does PHP5 fix this - How does PHP deal with it? -- consequences of the pattern
-- what is \"is a\" relationship?
-- Name an interesting PHP quirk you - What are some pitfalls to avoid in
-- How does that relate to design
came across in your last project? character handling?
patterns?
- How are defines different from SQL injection - How is HTML templating MVC?
variables? - what is an SQL injection attack? -- how is not like MVC?
-- Faster? -- How do you fix it? (three ways) - Name a principle of package reuse?
-- Better? -- Which one would you do? - Strengths and weaknesses of
- How does the Zend Engine work -- How do you create a security frameworks?
(basically)? (Or explain the what a JVM audit point? - In design define
is__ OTHER ATTACKS -- poor design example: (rigidity, fragility,
-- How does code caching work? - what is session fixation immobility, viscosity, needles complexity,
-- Why is Java and dotNet faster than - what is XSS needless repetition, opacity)
PHP ever will be? - what is XSRF -- Single Responsibility Principle?
-- how is javac different than gcc? -- Can you give an example about -- Open-Close Principle?
settings XSRF to determine login state on a -- Liskov Substitution Principle?
- What is \"safe mode\"? remote site? -- Dependency-Inversion Principle?
- How do you code around Philosophy -- Interface Segregation Principle?-
\"magic_quotes_gpc=on\"? - What does \"filter-input escape Principle of Package reuse
-- Release-Reuse Equivalenc?
- What is PEAR? output\" mean?
-- Common Closure Principle?
-- How do you install a PEAR library -- example of filter?
-- Common Reuse Principle?
-- How does PEAR handle errors? -- example of escape? -- Acyclic Dependencies Principle?
- What is a PHP extension? -- what is \"magic quotes\" and why is -- Stable Dependencies Principle?
-- Why extensions at all? what are the it bad? -- Stable Abstractions Principle?
advantages of extensions HTML/CSS - HTTP protocol
-- what are the disadvantages of - Example of browser rendering - what is the difference between post and
extensions? quirk? get?
-- How do you compile extensions? -- Workaround? -- name some HTTP headers?
-- Where repositories for extensions?… - Box model?… - areas of race conditions in PHP?…

Roadmap Challenges and Choices

Choices
Writing software is about
MAKING CHOICES
?
!

What is a
design pattern?
Has a name
Solves a problem
Independent of code that implements it
Has consequences
breadcrumbs
tabs

Pareto Principle

Pareto Principle

Ruby on Rails
graph of rock and hard
place
text: rock, hard place,
“here is ruby”
(Frameworks)

The Database
Ahmdahl’s law and abstraction (Premature
Optimization)
Database Scalability (“Moore’s Law” punt,
vs. master-slave, vs. vertical vs. horizontal
Independence vs. Portability

Roadmap Where Frameworks Rock

Toy Sites

“Enterprise”

Standardization

RAD

Roadmap Where PHP Rocks

Must keep with PHP’s
easy
simple
direct
ugly

Brayism
Tim Bray of Sun on
developing in PHP…

Brayism
Tim Bray

Glue
Originally 3 tier
Now glue: client, db, memcache, smtp
(virality), http services (REST, XMLRPC,
SOAP), http scraping, UDP logging, other
long-lived services (search, map reduce,
message q, cometd)

Roadmap Examples of Good Framework Design

Solves errors
Design patterns solve errors
in design

Other stuff
configuration, registry
caching (memcache = L2)
where? readthrough, output, db
publish-subscribe (inversion of control, AQS)
i18n/l10n
A-B testing, analytics, loggin

Roadmap Challenges and Choices in PHP

graph of 40%
40%
60%
use PHP don’t use PHP

graph of rock and hard
place
PHP

Bind lightly
Loose coupling
Loosly coupling
graph with various
ser vices
mention comet
mention map-reduce
mntion search
mention social-graph

Play nice
Story of memcache
Java patterns
Java and Javascript
language constructs
Even with Ruby
(deployment)

Especially with Ruby
php strengths from shared -
nothing
ruby strengths from multi-
threading
cloud computing (vs. PHP
hosted)
GitHub, CruiseControl, etc.

Roadmap Conclusion

Conclusion
Not “F— You!”
Image of me
“Blog This!”
Appreciate Feedback…
tychay@php.net
http://terrychay.com/blog/