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<?php function longest_palendrome($string) { $words = explode(' ', $string); $longest = ''; foreach ($words as $word) { $letters = $reversed = str_split($word); array_reverse($reversed); if ($letters === implode('', $reversed) && strlen($word) > strlen($longest)) { $longest = $word; } } return $word; } echo longest_palendrome("i ama racecar");
Output for git.master, git.master_jit, rfc.property-hooks
racecar

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