Functional approach in PHP

Wed, 19 Oct 2016 12:16:05 +0000

The code snippet below will only work in PHP-5.3+!.

Isn’t it the famous functional programming with functions as first class citizens, closures and other functional bla-bla?

<?php>

function one($a = 0) {
 return function(callable $b) use ($a) {
 return call_user_func($b, $a);
 };
}

print_r(call_user_func(one(1), function ($x) { return $x + 4; } ));

This was created just for fun. As you may see, in place of callable you can put any valid PHP callable, e.g.in a form ['Class', 'method']

Functional Programming on Roman Dushko - Personal blog

Functional approach in PHP