At my work place, we use PHP and CodeSniffer hooked up in Jenkins.
I liked the fact that PSR-1 and PSR-2 are approved by the committee.
The PSR0 standard is found at:
The PSR1 standard is found at:
The PSR2 standard is found at:
The PSR3 standard is found at:
p.s. Kohana 3.3 has PSR-0 and the migration from 3.2 to 3.3 is quite tough for me. It requires a lot of refactoring on my side…