Pipeline Challenge

pipeline-challenge.php

<?php

function make_pipeline(...$funcs)
{
    return function($arg) use ($funcs)
    {
        foreach ($funcs as $func) {
            $arg = $func($arg);
        }
        
        return $arg;
    };
}

$fun = make_pipeline( function($x) { return $x * 3; },
                      function($x) { return $x + 1; },
                      function($x) { return $x / 2; } );
echo $fun(3); # should print 5