pocketmine\level\format\mcregion\RegionLoader::saveChunk PHP Метод

    protected function saveChunk($x, $z, $chunkData)
    {
        $length = strlen($chunkData) + 1;
        if ($length + 4 > self::MAX_SECTOR_LENGTH) {
            throw new ChunkException("Chunk is too big! " . ($length + 4) . " > " . self::MAX_SECTOR_LENGTH);
        }
        $sectors = (int) ceil(($length + 4) / 4096);
        $index = self::getChunkOffset($x, $z);
        $indexChanged = false;
        if ($this->locationTable[$index][1] < $sectors) {
            $this->locationTable[$index][0] = $this->lastSector + 1;
            $this->lastSector += $sectors;
            //The GC will clean this shift "later"
            $indexChanged = true;
        } elseif ($this->locationTable[$index][1] != $sectors) {
            $indexChanged = true;
        }
        $this->locationTable[$index][1] = $sectors;
        $this->locationTable[$index][2] = time();
        fseek($this->filePointer, $this->locationTable[$index][0] << 12);
        fwrite($this->filePointer, str_pad(Binary::writeInt($length) . chr(self::COMPRESSION_ZLIB) . $chunkData, $sectors << 12, "", STR_PAD_RIGHT));
        if ($indexChanged) {
            $this->writeLocationIndex($index);
        }
    }