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<?php |
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/** |
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* File containing the {@see ConvertHelper_ByteConverter} class. |
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* |
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* @package AppUtils |
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* @subpackage ConvertHelper |
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* @see ConvertHelper_ByteConverter |
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*/ |
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declare(strict_types=1); |
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namespace AppUtils; |
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/** |
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* This class is made to convert an amount of bytes into a storage |
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* size notation like "50 MB". |
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* |
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* It supports both Base 10 and Base 2 size calculation. |
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* |
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* @package AppUtils |
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* @subpackage ConvertHelper |
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* @author Sebastian Mordziol <[email protected]> |
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*/ |
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class ConvertHelper_ByteConverter |
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{ |
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/** |
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* @var int |
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*/ |
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protected $bytes; |
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public function __construct(int $bytes) |
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{ |
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$this->bytes = $bytes; |
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// correct negative values |
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if($this->bytes < 0) |
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{ |
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$this->bytes = 0; |
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} |
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} |
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/** |
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* Detects the size matching the byte value for the specified base. |
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* |
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* @param int $base |
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* @return ConvertHelper_StorageSizeEnum_Size |
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*/ |
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protected function detectSize(int $base) : ConvertHelper_StorageSizeEnum_Size |
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{ |
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$sizes = $this->getSizesSorted($base); |
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if($this->bytes >= $sizes[0]->getBytes()) |
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{ |
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$total = count($sizes); |
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for($i=0; $i < $total; $i++) |
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{ |
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$size = $sizes[$i]; |
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if(!isset($sizes[($i+1)])) { |
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return $size; |
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} |
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if($this->bytes >= $size->getBytes() && $this->bytes < $sizes[($i+1)]->getBytes()) { |
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return $size; |
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} |
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} |
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} |
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return ConvertHelper_StorageSizeEnum::getSizeByName('b'); |
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} |
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/** |
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* Retrieves all storage sizes for the specified base, |
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* sorted from smallest byte size to highest. |
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* |
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* @param int $base |
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* @return \AppUtils\ConvertHelper_StorageSizeEnum_Size[] |
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*/ |
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protected function getSizesSorted(int $base) |
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{ |
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$sizes = ConvertHelper_StorageSizeEnum::getSizesByBase($base); |
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usort($sizes, function(ConvertHelper_StorageSizeEnum_Size $a, ConvertHelper_StorageSizeEnum_Size $b) |
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{ |
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return $a->getBytes() - $b->getBytes(); |
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}); |
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return $sizes; |
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} |
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/** |
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* Converts the byte value to a human readable string, e.g. "5 KB", "140 MB". |
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* |
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* @param int $precision The amount of decimals (rounded up) |
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* @param int $base The base to calculate bytes with. |
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* @return string |
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* |
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* @see ConvertHelper_StorageSizeEnum::BASE_10 |
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* @see ConvertHelper_StorageSizeEnum::BASE_2 |
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*/ |
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public function toString(int $precision, int $base=ConvertHelper_StorageSizeEnum::BASE_10) : string |
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{ |
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$size = $this->detectSize($base); |
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return round($this->bytes / $size->getBytes(), $precision) . ' ' . $size->getSuffix(); |
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} |
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/** |
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* Converts the byte value to the amount of the corresponding units (KB, MB...). |
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* |
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* @param int $precision The amount of decimals (rounded up) |
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* @param string $sizeName The lowercase storage size name (e.g. "kb", "kib") |
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* @return float |
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*/ |
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public function toNumber(int $precision, string $sizeName) : float |
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{ |
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$size = ConvertHelper_StorageSizeEnum::getSizeByName($sizeName); |
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return round($this->bytes / $size->getBytes(), $precision); |
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} |
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/** |
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* Converts the bytes to Kilobytes. |
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* |
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* @param int $precision Amount of decimals (rounded up) |
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* @return float |
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*/ |
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public function toKilobytes(int $precision=1) : float |
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{ |
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return $this->toNumber($precision, 'kb'); |
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} |
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/** |
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* Converts the bytes to Megabytes. |
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* |
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* @param int $precision Amount of decimals (rounded up) |
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* @return float |
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*/ |
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public function toMegabytes(int $precision=1) : float |
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{ |
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return $this->toNumber($precision, 'mb'); |
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} |
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/** |
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* Converts the bytes to Gigabytes. |
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* |
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* @param int $precision Amount of decimals (rounded up) |
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* @return float |
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*/ |
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public function toGigabytes(int $precision=1) : float |
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{ |
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return $this->toNumber($precision, 'gb'); |
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} |
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/** |
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* Converts the bytes to Terabytes. |
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* |
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* @param int $precision Amount of decimals (rounded up) |
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* @return float |
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*/ |
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public function toTerabytes(int $precision=1) : float |
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{ |
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return $this->toNumber($precision, 'tb'); |
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} |
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/** |
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* Converts the bytes to Petabytes. |
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* |
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* @param int $precision Amount of decimals (rounded up) |
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* @return float |
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*/ |
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public function toPetabytes(int $precision=1) : float |
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{ |
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return $this->toNumber($precision, 'pb'); |
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} |
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/** |
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* Converts the bytes to Kibibytes (Base 2). |
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* |
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* @param int $precision Amount of decimals (rounded up) |
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* @return float |
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*/ |
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public function toKibibytes(int $precision=1) : float |
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{ |
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return $this->toNumber($precision, 'kib'); |
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} |
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/** |
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* Converts the bytes to Mebibytes (Base 2). |
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* |
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* @param int $precision Amount of decimals (rounded up) |
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* @return float |
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*/ |
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public function toMebibytes(int $precision=1) : float |
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{ |
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return $this->toNumber($precision, 'mib'); |
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} |
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/** |
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* Converts the bytes to Gibibytes (Base 2). |
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* |
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* @param int $precision Amount of decimals (rounded up) |
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* @return float |
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*/ |
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public function toGibibytes(int $precision=1) : float |
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{ |
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return $this->toNumber($precision, 'gib'); |
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} |
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/** |
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* Converts the bytes to Tebibytes (Base 2). |
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* |
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* @param int $precision Amount of decimals (rounded up) |
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* @return float |
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*/ |
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public function toTebibytes(int $precision=1) : float |
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{ |
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return $this->toNumber($precision, 'tib'); |
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} |
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/** |
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* Converts the bytes to Pebibytes (Base 2). |
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* |
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* @param int $precision Amount of decimals (rounded up) |
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* @return float |
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*/ |
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public function toPebibytes(int $precision=1) : float |
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{ |
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return $this->toNumber($precision, 'pib'); |
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} |
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} |
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