<?php declare(strict_types=1); $processor = function ($data) { $data = htmlentities($data); $data = str_split($data); $data = (fn ($x) => array_map(strtoupper(...), $x))($data); $data = (fn ($x) => array_filter($x, fn ($v) => $v != 'O'))($data); return $data; }; $data = "Hello World!"; var_dump( $data, $processor($data), );
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