Coding Guidelines

You can validate that your code complies with these guidelines by running stuff/php-format.py validate
Tabs, no spaces
End of line should should be Unix style (\n), not Windows style (\r\n)
Opening brackets goes in the same line as the last statement

    if (condition) {
        stuff;
    }

A space between keywords and parenthesis for: if, else, while, switch, catch, function
Function calls have no space before the parentheses
No spaces are left inside the parentheses
A space after each comma, but without space before
All binary operators must have one space before and one after
There should not be more than one contiguous blank line
There should be no empty comments
You should not use block comments / * ... * /, only line // ...
Changes in functionality must be accompanied by their respective new / modified tests
Exceptions must be used to report erroneous states. The use of functions that return true / false is allowed when they are expected values
Use [RAII] (http://en.wikipedia.org/wiki/Resource_Acquisition_Is_Initialization) when appropriate, mainly in the administration of resources (files, etc ...)