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<?php $address = '1::1'; $parts = explode(':', $address); $len = count($parts); if ($len < 8) { if ($parts[0] === '') { array_splice($parts, 0, 0, array_fill(0, 8 - $len, 0)); $parts = array_reverse($parts); } else { $parts = array_reverse($parts); if ($parts[0] === '') { array_splice($parts, 0, 0, array_fill(0, 8 - $len, 0)); } else { array_splice($parts, array_search('', $parts), 0, array_fill(0, 8 - $len, 0)); } } } var_dump($parts);

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