Make_pipeline

makePipeline.php

<?php
class Pipeline
{
    public static function make_pipeline()
    {
        return $result = function($arg) use ($funcs)
        {
            foreach($funcs as $func)
            {
                if(!isset($value))
                {
                    $value  =   $func($arg);
                }
                else
                {
                    $value  =   $func($value);
                }
            }
            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