@me/changelog: PHP
- Arrays: indexed vs associative, common functions (array_map, array_filter, array_merge)
- String manipulation (str_replace, explode, implode, sprintf)
- Object-oriented basics: classes, methods, $this , inheritance
- Namespaces and use statements (relevant to Drupal plugins)
- Anonymous functions and closures
- isset() , empty() , null coalescing operator ( ?? )
- Type juggling and strict comparisons ( === vs == )