Formatting

120 character (soft) limit per line as the rest of the document.

Enclosed all types and values in code markup to stress the point that
they are referring to text within the actual PHP scripts.

Changed all values to uppercase, as is the case in every PHP
documentation. This was used inconsistent if your compare the section of
type null against the section of type true and false.

Use the same example paragraph headings for all examples and do not
switch between “For Example” and “Example X”. Also made them bold so
they stand out more.

Use PHP syntax highlighting for all code examples.

Removed switching first letter’s case within continuous text of the word
class to be always lowercased (there is no apparent reason why one would
write it uppercased in some situations and lowercased in others).

Made each reference to C() (the method from the self example)
lowercased, since methods SHOULD always start with a lowercased letter,
and removed the parentheses.

Made each reference to A, B, and c italic/emphasized.