Online PHP editor | refs for PuVIl

<?php function is_palindrome(string $str): bool { return $str === implode('', array_reverse(grapheme_str_split($str))); } $palindrome = 'satanoscillatemymetallicsonatas'; $polar_bear = "\u{1f43b}\u{200d}\u{2744}\u{fe0f}"; $palindrome = str_replace('y', $polar_bear, $palindrome); echo "$palindrome is" . (is_palindrome($palindrome) ? "" : " not") . " a palindrome";