Zend had provided the guidelines for developers and teams working on or with Zend Framework.
Details posted on : http://framework.zend.com/wiki/display/ZFDEV/Zend+Framework+Contributor+Guide.
Within the guidelines we can see 2 subjects for coding standards :
No.4 PHP Coding Standard (draft) – It’s the basic php coding standards for developers.
No.10 ZF Coding Standards (RC) – It’s the supplementary of No.4 which is the coding standards for those who working on Zend Framework.
What we see in appendix B from manual is exactly No.4.
And here, I will give you a deep explanation of No.10 ZF Coding Standards (RC) together with No.4 in five chapters.
PS : you had better read PEAR Coding Standards first before continue.