FindPHPFiles traverses the file system starting with the passed folder and finding all files with a .php extension.

FindVarNode returns expression variable node root.

IsCapitalized reports whether s starts with an upper case letter.

IsSpecialClassName checks if the passed node is a special class name.

NameNodeEquals checks whether n node name value is identical to s.

NameNodeToString converts nodes of *name.Name, and *node.Identifier to string.