Traits switcher

traits_switchers.php

<?php

trait Bar1
{
    function getBody($type, &$body) {
        switch($type) {
        case 1:
            $body = 'A';
            break;
        case 2:
            $body = 'B';
            break;
        }
    }
}

trait Bar2
{
    function getBody($type, &$body) {
        switch($type) {
        case 3:
            $body = 'C';
            break;
        case 4:
            $body = 'D';
            break;
        }
    }
}

class Foo
{
    use Bar1, Bar2 {
        Bar1::getBody insteadof Bar2;
        Bar1::getBody as bar1;
        Bar2::getBody as bar2;
    }

    function choose($type)
    {
        $body = '';
        foreach (['bar1', 'bar2',] as $switcher) {
            static::$switcher($type, $body);
        }
        return $body;
    }
}

$foo = new Foo;

assert($foo->choose(1) == 'A');
assert($foo->choose(2) == 'B');
assert($foo->choose(3) == 'C');
assert($foo->choose(4) == 'D');