PHP Guides
Core language fundamentals — arrays, sessions, and control flow.
All guides
Session Handling in PHP
How PHP sessions actually work under the hood, how to configure them safely, and the most common session bugs.
Control Structures and Loops in PHP
if/elseif/else, switch vs match, and for/foreach/while/do-while — including the loop-in-a-loop gotchas that actually bite in real code.
Array Functions in PHP: A Practical Reference
The array functions you'll actually reach for day to day — array_map, array_filter, array_reduce, array_column, and array_merge — with real examples.