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<?php |
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/** |
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* |
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* This file is part of Aura for PHP. |
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* |
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* @license http://opensource.org/licenses/bsd-license.php BSD |
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* |
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*/ |
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namespace Aura\Filter\Rule\Validate; |
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use Psr\Http\Message\UploadedFileInterface; |
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/** |
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* |
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* Validates that the value is a PSR7 UploadedFile with various properties |
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* |
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* @package Aura.Filter |
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* |
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*/ |
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class UploadedFile |
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{ |
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const REQUIRED = 'required'; |
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const FILE_EXTENSION = 'fileExtension'; |
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const FILE_MEDIA = 'fileMedia'; |
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const SIZE_MAX = 'sizeMax'; |
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const SIZE_MIN = 'sizeMin'; |
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protected $rules = array( |
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self::REQUIRED, |
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self::FILE_EXTENSION, |
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self::FILE_MEDIA, |
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self::SIZE_MAX, |
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self::SIZE_MIN, |
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); |
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/** |
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* |
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* Validates the presenece and properites if a PSR7 FileUploadInterface |
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* |
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* valid options: |
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* - required : bool require file is uploaded |
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* - fileExtension : array or strign of acceptable file extensions |
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* - fileMedia : array or strign of acceptable file media types |
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* - sizeMax : bytes or human readable string |
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* - sizeMin : bytes or human readable string |
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* |
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* @param object $subject The subject to be filtered. |
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* |
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* @param string $field The subject field name. |
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* |
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* @return bool True if valid, false if not. |
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* |
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*/ |
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public function __invoke($subject, $field, array $options) |
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{ |
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$value = $subject->$field; |
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if (! $this->isRequired($options) |
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&& ! $this->fileWasUploaded($value) |
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) { |
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return true; |
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} |
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foreach ($this->rules as $rule) { |
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if (array_key_exists($rule, $options)) { |
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if (! $this->$rule($value, $options[$rule])) { |
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return false; |
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} |
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} |
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} |
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// looks like we're ok! |
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return true; |
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} |
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/** |
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* If the file required to be uploaded? |
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* |
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* @param array $options the options passed tot the filter |
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* |
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* @return bool |
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* |
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* @access protected |
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*/ |
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protected function isRequired(array $options) |
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{ |
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return ( |
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isset($options[self::REQUIRED]) |
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&& $options[self::REQUIRED] == true |
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); |
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} |
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/** |
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* Is value an instance of a PSR7 UploadedFileInterface? |
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* |
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* @param mixed $value value being validated |
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* |
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* @return bool |
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* |
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* @access protected |
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*/ |
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protected function isUploadedFile($value) |
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{ |
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return ($value instanceof UploadedFileInterface); |
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} |
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/** |
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* Was a file uploaded ? |
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* |
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* @param mixed $value value being validated |
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* |
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* @return bool |
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* |
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* @access protected |
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*/ |
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protected function fileWasUploaded($value) |
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{ |
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if (! $this->isUploadedFile($value)) { |
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return false; |
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} |
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if ($value->getError() !== UPLOAD_ERR_OK) { |
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return false; |
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} |
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return true; |
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} |
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/** |
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* Required Rule Test |
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* |
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* @param mixed $value value being validated |
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* @param bool $option if the file is required |
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* |
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* @return bool |
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* |
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* @access protected |
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*/ |
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protected function required($value, $option) |
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{ |
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if ($option === false) { |
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return true; |
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} |
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return $this->fileWasUploaded($value); |
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} |
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/** |
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* FileExtension Rule Test |
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* |
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* @param mixed $value value being validated |
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* @param string|array $exts array or string of valid extensions |
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* |
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* @return bool |
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* |
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* @access protected |
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*/ |
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protected function fileExtension($value, $exts) |
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{ |
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$filename = $value->getClientFilename(); |
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$ext = strtolower(pathinfo($filename, PATHINFO_EXTENSION)); |
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return in_array($ext, array_map('strtolower', (array) $exts)); |
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} |
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/** |
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* FileMedia Rule Test |
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* |
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* @param mixed $value value being validated |
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* @param string|array $medias array or string of valid media types |
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* |
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* @return bool |
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* |
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* @access protected |
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*/ |
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protected function fileMedia($value, $medias) |
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{ |
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$media = $value->getClientMediaType(); |
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return in_array($media, (array) $medias); |
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} |
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/** |
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* SizeMax Rule Test |
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* |
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* @param mixed $value value being validated |
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* @param mixed $max maximum file size |
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* |
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* @return bool |
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* |
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* @access protected |
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*/ |
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protected function sizeMax($value, $max) |
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{ |
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$size = $value->getSize(); |
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return $size < $this->parseHumanSize($max); |
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} |
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/** |
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* SizeMin |
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* |
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* @param mixed $value value being validated |
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* @param mixed $min minimum file size |
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* |
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* @return mixed |
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* |
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* @access protected |
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*/ |
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protected function sizeMin($value, $min) |
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{ |
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$size = $value->getSize(); |
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return $size > $this->parseHumanSize($min); |
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} |
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/** |
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* Parse human readable size to bytes |
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* |
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* @param mixed $size size indicator |
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* |
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* @return double|int |
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* |
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* @access public |
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*/ |
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public function parseHumanSize($size) |
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{ |
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$number = substr($size, 0, -2); |
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switch(strtoupper(substr($size, -2))){ |
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case "KB": |
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return $number * 1024; |
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case "MB": |
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return $number * pow(1024, 2); |
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case "GB": |
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return $number * pow(1024, 3); |
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case "TB": |
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return $number * pow(1024, 4); |
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case "PB": |
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return $number * pow(1024, 5); |
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default: |
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return $size; |
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} |
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} |
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} |
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