PHP 8.0: array_walk(): Argument $key must be passed by reference, value given · Issue #1085 · elastic/elasticsearch-php · GitHub
Use `array_walk` instead of `foreach`.md -- Potherca's rules for creating more robust code in PHP · GitHub
usort() callback signature mismatch / array_walk() not analyzed? · Issue #6179 · phpstan/phpstan · GitHub
![php - How to use array_walk on class method that does not fit the $callback parameter order - Stack Overflow php - How to use array_walk on class method that does not fit the $callback parameter order - Stack Overflow](https://i.stack.imgur.com/CWHp5.png)