File Metrics for PHP

This document outlines the definition of file metrics for PHP.

complexity

The "complexity" metric counts:

if and else if statements
ternary operators and nullish coalescing operators
for and foreach loops
while and do...while loops
case labels in switch-statements
conditional expressions in match expressions
catch blocks
logical binary operations &&, || and xor
everything counted for the "functions" metric

It does not count:

goto statements
any function calls

functions

The "functions" metric counts:

methods and functions in classes, abstract classes, interfaces, traits, enums (incl. constructors and destructors)
lambda functions
anonymous functions

classes

The "classes" metric counts:

definitions of class, abstract class, interface, trait and enum
anonymous classes

lines_of_code, comment_lines, real_lines_of_code and keywords_in_comments