How to Use Arrow Functions in PHP 7.4+

PHP 7.4 introduced arrow functions as a concise way to write short, anonymous functions. They offer a compact syntax for single-expression functions and automatically capture variables from the outer scope. Arrow functions are ideal for simple callbacks in array operations like map, filter, and reduce. Unlike traditional anonymous functions, they don't require curly braces or an explicit return statement. This new feature enhances code readability and reduces verbosity, especially for simple operations and inline functions.