<?php
class Pipeline
{
    public static function make_pipeline($funcs)
    {
        $func_list = func_get_args();

            $result = function($arg) use ($func_list)
            {
                foreach($func_list as $funcs)
                {
                    if(!isset($value))
                    {
                        print "set nilai!\n";
                        $value  =   $funcs($arg);
                    }else{
                        print "update nilai!\n";
                        $value  =   $funcs($value);
                    }

                    print "Argumen $value is: " . $value . "\n";
                }
                return $value;
            };

         return $result;
    }
}

$fun = Pipeline::make_pipeline(function($x) { return $x * 3; },
                               function($x) { return $x + 1; },
                               function($x) { return $x / 2; });

echo $fun(3); # should print 5