44     protected $words;  variable in IPLib\\Address\\IPv6
70         $this->words = null;
188      * @param int[]|array $words
192     public static function fromWords(array $words)  argument
195         if (count($words) === 8) {
198                 $word = $words[$i];
289         if ($this->words === null) {
290             $this->words = array_map(
298         return $this->words;
460         $words = $this->getWords();
461         for ($i = count($words) - 1; $i >= 0; --$i) {
462             if ($words[$i] === 0xffff) {
467                 $words[$i] = 0;
469                 ++$words[$i];
474         return $overflow ? null : static::fromWords($words);
485         $words = $this->getWords();
486         for ($i = count($words) - 1; $i >= 0; --$i) {
487             if ($words[$i] === 0) {
492                 $words[$i] = 0xffff;
494                 --$words[$i];
499         return $overflow ? null : static::fromWords($words);