Curry and Partial function in PHP

That such a currying and partial application of the function can be found here in this article .

Actually here is the implementation in PHP: github.com/Elfet/Functional

Example of using partial applications:

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use Functional\Partial; function foo($a, $b, $c) { return "foo<$a, $b, $c>\n"; } $p = Partial::apply('foo', 1, 2); echo $p(3); // foo<1, 2, 3> 

You can also use named parameters:

 $p = Partial::applyNamed('foo', array('a' => 1, 'c' => 3)); echo $p(2); // foo<1, 2, 3> 

You can set default values:

 $p = Partial::apply(function ($a, $b, $c = 'c') { return "function()<$a-$b-$c>\n"; }, 1); echo $p(2); // function()<1-2-c> 

Or add options later:

 class Boo { public function woo($a, $b, $c) { return "Boo::woo<$a, $b, $c>\n"; } } $p = Partial::apply(array($boo, 'woo')); $p->applyArgs(1, 2); $p->applyNamedArgs(array('b' => 3)); echo $p(); // Boo::woo<1, 3, 2> 

Curry example:

 use Functional\Curry; function foo($a, $b, $c) { return "foo<$a, $b, $c>\n"; } $c = new Curry('foo'); echo $c->invoke(1)->invoke(2)->invoke(3); // foo<1, 2, 3> 

Or use abbreviated syntax:

 echo $c[1][2][3]; // foo<1, 2, 3>