Refactoring to arrow function In this refactoring we change a function call to fn, for onliners this is a huge improvement https://www.php.net/manual/en/functions.arrow.php
requires: php 7.4.0

Arrow functions were introduced in PHP 7.4 as a more concise syntax for anonymous functions. Both anonymous functions and arrow functions are implemented using the Closure class. Arrow functions have the basic form fn (argument_list) => expr. Arrow functions support the same features as anonymous functions, except that using variables from the parent scope is always automatic. When a variable used in the expression is defined in the parent scope it will be implicitly captured by value. In the following example, the functions $fn1 and $fn2 behave the same way.

Original code



        $a = 5;
        $b = 6;

        function multiply($a, $b)
        {
            return $a * $b;
        }

        $product = multiply($a, $b);

        

Refactored code



        $a = 5;
        $b = 6;

        $multiply = fn($a, $b) => $a * $b;
        $product  = $multiply($a, $b);

        

Here is the output of the code

This is the output of original

30

This is the output of refactor

30

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