PHP array_map for associative array – Fast Tips

PHP's built-in array_map function doesn't expose array keys in its callback, making it awkward to work with associative arrays. A custom array_map_assoc helper function is presented that wraps array_map and array_keys to pass both key and value to the callback. A real-world use case is shown: transforming date-keyed NoSQL data into a label/value format for a JavaScript chart library. The post also compares this approach to using foreach, arguing the custom function produces cleaner, more readable one-liner code.