Halloween Code Golf

spooky.php

<?php

class Spooky
{
    static $halloweenWords = ["apparition","bat","bloodcurdling","bloodsucker","bloody","bones","boogeyman","broomstick","cadaver","carved","cauldron","cemetery","chainsaw","cobweb","coffin","corpse","crypt","cursed","decapitated","decomposing","demon","dotdigital","enchanted","evil","exorcism","fangs","ghost","ghoulish","goblin","gory","gravestone","graveyard","grim","gruesome","halloween","happy","haunted","haunting","howling","incantation","knife","levitation","lurking","medium","monsters","mummified","mummy","occult","orbs","paranormal","petrified","phantom","pitchfork","poltergeist","possessed","reanimated","ritual","satanic","scary","screaming","shadow","shaking","skeleton","skull","sorcery","specter","spell","spider","spirit","spooked","terrified","terror","toad","trembling","troll","undead","unearthly","vampire","werewolf","witchcraft","wizard","wraith","zombie"];

    static $outputPhrase = '';

    public static function decipher($c)
    {
        self::tryBlockSize($c);
        return self::$outputPhrase;
    }

    private static function tryBlockSize($c, $start = 2)
    {
        $blockSize = self::guessBlockSize(strlen($c), $start);
        $string = self::unTangle($c, $blockSize);

        self::parseString($string);

        if (self::$outputPhrase === '') {
            $blockSize = self::tryBlockSize($c, $start + 1);
        }
    }

    private static function unTangle($cipher, $size)
    {
        $string = '';
        $columns = str_split($cipher, (strlen($cipher) / $size));

        foreach ($columns as $i => $column) {
            $charactersInColumn[$i] = str_split($column, 1);
        }

        for ($i = 0; $i <= count($charactersInColumn[0]); $i++) {
            $string .= implode(array_column($charactersInColumn, $i));
        }

        return $string;
    }

    private static function parseString($string) {
        foreach (self::$halloweenWords as $word) {
            $pos = strpos($string, $word);
            if ($pos === 0) {
                self::$outputPhrase .= $word;
                $remainder = substr($string, strlen($word));
                if (strlen($remainder) === 0) {
                    return;
                }
                self::$outputPhrase .= ' ';
                self::parseString($remainder);
            }
        }
    }

    private static function guessBlockSize($cLength, $startAt = 2)
    {
        for ($x = $startAt; $x < 10; $x++) {
            $mod = fmod($cLength, $x);
            if ($mod === 0.0) {
                return $x;
            }
        }
        return 0;
    }
}

$c = "haeialngpldipootywtahedl";
echo Spooky::decipher($c);
?>