Two Questions...

Why this, why now?

What is a Koan?

kōan /ˈkoʊ.ɑːn/

A kōan is a story, dialogue, question, or statement, which is used in Zen practice to provoke the "great doubt" and test a student's progress in Zen practice.

--Wikipedia

"You can hear the sound of two hands when they clap together, now show me the sound of one hand."

The lineage of PHP Koans

• The Little LISPer - Published 1989
• Ruby Koans - January 2009 (probably earlier)
• Python Koans - May 2009 (Greg Malcolm)

Other Koans Projects

• Ruby Koans
• Java Koans
• Go Koans
• Scala Koans
• Clojure Koans
• Lisp Koans
• Perl Koans
• Haskell Koans

• Erlang Koans
• ColdFusion Koans
• Bash Koans
• .Net Koans
• C++ Koans
• Lua Koans
• Groovy Koans
• And more...