We will use PSR-0, with the following modifications/additional preferences:

• opening braces on same line for class names, function names, and control statements
• control structure braces are always used, even for single line statements

• StudlyCaps for class names
• lower_under for method names
• camelCase for variable names

• indentation of 4 spaces
• no horizontal whitespace padding the inside of parentheses
• no space after function names
• single space after control keywords
• single space after commas

• TRUE/FALSE/NULL all in uppercase
• soft line length limit of 80 characters, no hard line length limit