The following coding standards are based upon PEAR coding standards. It is partially copy-pasted from the source mentioned above. I have added a few sections and made a few changes and/or improvements (I hope) to the existing ones.
Please read entire document carefully BEFORE you start coding with us. It is vital to the source code readability to keep convention. If you do not like some solutions - get used to them.
This document is rather short, so you can read it while having half a cup of good coffee. Have a nice reading.