<?php
error_reporting(E_ALL);
$h = substr(key(parse_url(1)), 3, 1); // 'path' の h
$e = substr(key(pathinfo(1)), 6, 1); // 'dirname' の e
$l = substr(array_keys(pathinfo(1))[2], 2, 1); // 'filename' の l
$o = substr(gettype(true), 1, 1); // 'bool' の o
ob_start();
http_build_query(); // '\nWarning: http_build_query() expects at least 1 parameter, 0 given in'
$buffer = trim(ob_get_contents());
$W = substr($buffer, 0, 1);
$r = substr($buffer, 2, 1);
$d = substr($buffer, 18, 1);
$space = substr($buffer, 8, 1);
ob_end_clean();
$helloWorld = ucwords($h . $e . $l . $l . $o) . $space . $W . $o . $r . $l . $d;
echo $helloWorld, PHP_EOL;