PHP Quiz

# PHP quiz

1) PHP 8.x introduced:
   a) typed properties + nullsafe + match + readonly + enums + named args
   b) only an interpreter speedup
   c) removed arrays
   d) goto statement

2) Which is the modern way to convert a string to int?
   a) (int)$s or intval($s, 10)
   b) parseInt($s)
   c) toint($s)
   d) atoi($s)

3) === vs ==:
   a) the same
   b) === checks type AND value; == coerces types before comparing
   c) === is deprecated
   d) === only works on strings

4) The nullsafe operator ?->
   a) replaces if (isset(...))
   b) short-circuits if the left side is null, returning null
   c) only works on arrays
   d) was removed in PHP 8.2

5) Named arguments allow:
   a) reordering
   b) calling functions with arg-name: value pairs, skipping defaults
   c) creating constants
   d) reflection only

6) match() differs from switch() because:
   a) match uses strict comparison and returns a value
   b) match supports loops
   c) match is for arrays
   d) it does not exist

7) readonly properties:
   a) are constants
   b) can be set once in the constructor, never reassigned
   c) only work on strings
   d) compile to private

8) Composer is:
   a) a music tool
   b) PHP's dependency manager + autoloader
   c) deprecated
   d) a framework

Answers: 1a, 2a, 3b, 4b, 5b, 6a, 7b, 8b.

<?php
// Quizzes appear at the end of each lesson — 3 questions each.
echo 'Test yourself when you finish a lesson!';