<?php function assign_to(&$var) { return function ($value) use (&$var) { $var = $value; }; } $string = "Hello World!"; $string |> strtolower(...) |> ucfirst(...) |> assign_to($result); var_dump($result);
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Here you find the average performance (time & memory) of each version. A grayed out version indicates it didn't complete successfully (based on exit-code).