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<?php class Bijective { public $dictionary = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789"; public function __construct() { $this->dictionary = str_split($this->dictionary); var_dump($this->dictionary); } public function encode($i) { if ($i == 0) return $this->dictionary[0]; $result = ''; $base = count($this->dictionary); while ($i > 0) { $result[] = $this->dictionary[($i % $base)]; $i = floor($i / $base); } var_dump($result); $result = array_reverse($result); var_dump($result); return join("", $result); } public function decode($input) { $i = 0; $base = count($this->dictionary); $input = str_split($input); foreach($input as $char) { $pos = array_search($char, $this->dictionary); $i = $i * $base + $pos; } return $i; } } $bj = new Bijective(); $hash = $bj->encode($bj->decode('Abc') + 1); var_dump($hash);

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