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<?php |
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namespace Box\Spout\Writer\Common\Helper; |
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/** |
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* Class ZipHelper |
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* This class provides helper functions to create zip files |
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* |
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* @package Box\Spout\Writer\Common\Helper |
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*/ |
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class ZipHelper |
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{ |
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const ZIP_EXTENSION = '.zip'; |
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/** Controls what to do when trying to add an existing file */ |
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const EXISTING_FILES_SKIP = 'skip'; |
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const EXISTING_FILES_OVERWRITE = 'overwrite'; |
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/** |
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* Returns a new ZipArchive instance pointing at the given path. |
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* |
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* @param string $tmpFolderPath Path of the temp folder where the zip file will be created |
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* @return \ZipArchive |
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*/ |
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public function createZip($tmpFolderPath) |
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{ |
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$zip = new \ZipArchive(); |
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$zipFilePath = $tmpFolderPath . self::ZIP_EXTENSION; |
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$zip->open($zipFilePath, \ZipArchive::CREATE|\ZipArchive::OVERWRITE); |
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return $zip; |
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} |
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/** |
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* @param \ZipArchive $zip An opened zip archive object |
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* @return string Path where the zip file of the given folder will be created |
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*/ |
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public function getZipFilePath(\ZipArchive $zip) |
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{ |
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return $zip->filename; |
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} |
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/** |
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* Adds the given file, located under the given root folder to the archive. |
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* The file will be compressed. |
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* |
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* Example of use: |
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* addFileToArchive($zip, '/tmp/xlsx/foo', 'bar/baz.xml'); |
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* => will add the file located at '/tmp/xlsx/foo/bar/baz.xml' in the archive, but only as 'bar/baz.xml' |
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* |
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* @param \ZipArchive $zip An opened zip archive object |
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* @param string $rootFolderPath Path of the root folder that will be ignored in the archive tree. |
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* @param string $localFilePath Path of the file to be added, under the root folder |
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* @param string|void $existingFileMode Controls what to do when trying to add an existing file |
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* @return void |
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*/ |
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public function addFileToArchive($zip, $rootFolderPath, $localFilePath, $existingFileMode = self::EXISTING_FILES_OVERWRITE) |
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{ |
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$this->addFileToArchiveWithCompressionMethod( |
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$zip, |
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$rootFolderPath, |
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$localFilePath, |
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$existingFileMode, |
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\ZipArchive::CM_DEFAULT |
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); |
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} |
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/** |
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* Adds the given file, located under the given root folder to the archive. |
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* The file will NOT be compressed. |
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* |
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* Example of use: |
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* addUncompressedFileToArchive($zip, '/tmp/xlsx/foo', 'bar/baz.xml'); |
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* => will add the file located at '/tmp/xlsx/foo/bar/baz.xml' in the archive, but only as 'bar/baz.xml' |
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* |
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* @param \ZipArchive $zip An opened zip archive object |
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* @param string $rootFolderPath Path of the root folder that will be ignored in the archive tree. |
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* @param string $localFilePath Path of the file to be added, under the root folder |
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* @param string|void $existingFileMode Controls what to do when trying to add an existing file |
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* @return void |
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*/ |
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public function addUncompressedFileToArchive($zip, $rootFolderPath, $localFilePath, $existingFileMode = self::EXISTING_FILES_OVERWRITE) |
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{ |
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$this->addFileToArchiveWithCompressionMethod( |
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$zip, |
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$rootFolderPath, |
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$localFilePath, |
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$existingFileMode, |
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\ZipArchive::CM_STORE |
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); |
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} |
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/** |
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* Adds the given file, located under the given root folder to the archive. |
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* The file will NOT be compressed. |
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* |
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* Example of use: |
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* addUncompressedFileToArchive($zip, '/tmp/xlsx/foo', 'bar/baz.xml'); |
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* => will add the file located at '/tmp/xlsx/foo/bar/baz.xml' in the archive, but only as 'bar/baz.xml' |
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* |
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* @param \ZipArchive $zip An opened zip archive object |
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* @param string $rootFolderPath Path of the root folder that will be ignored in the archive tree. |
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* @param string $localFilePath Path of the file to be added, under the root folder |
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* @param string $existingFileMode Controls what to do when trying to add an existing file |
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* @param int $compressionMethod The compression method |
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* @return void |
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*/ |
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protected function addFileToArchiveWithCompressionMethod($zip, $rootFolderPath, $localFilePath, $existingFileMode, $compressionMethod) |
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{ |
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if (!$this->shouldSkipFile($zip, $localFilePath, $existingFileMode)) { |
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$normalizedFullFilePath = $this->getNormalizedRealPath($rootFolderPath . '/' . $localFilePath); |
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$zip->addFile($normalizedFullFilePath, $localFilePath); |
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if (self::canChooseCompressionMethod()) { |
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$zip->setCompressionName($localFilePath, $compressionMethod); |
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} |
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} |
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} |
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/** |
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* @return bool Whether it is possible to choose the desired compression method to be used |
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*/ |
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public static function canChooseCompressionMethod() |
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{ |
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// setCompressionName() is a PHP7+ method... |
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return (method_exists(new \ZipArchive(), 'setCompressionName')); |
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} |
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/** |
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* @param \ZipArchive $zip An opened zip archive object |
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* @param string $folderPath Path to the folder to be zipped |
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* @param string|void $existingFileMode Controls what to do when trying to add an existing file |
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* @return void |
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*/ |
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public function addFolderToArchive($zip, $folderPath, $existingFileMode = self::EXISTING_FILES_OVERWRITE) |
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{ |
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$folderRealPath = $this->getNormalizedRealPath($folderPath) . '/'; |
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$itemIterator = new \RecursiveIteratorIterator(new \RecursiveDirectoryIterator($folderPath, \RecursiveDirectoryIterator::SKIP_DOTS), \RecursiveIteratorIterator::SELF_FIRST); |
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foreach ($itemIterator as $itemInfo) { |
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$itemRealPath = $this->getNormalizedRealPath($itemInfo->getPathname()); |
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$itemLocalPath = str_replace($folderRealPath, '', $itemRealPath); |
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if ($itemInfo->isFile() && !$this->shouldSkipFile($zip, $itemLocalPath, $existingFileMode)) { |
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$zip->addFile($itemRealPath, $itemLocalPath); |
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} |
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} |
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} |
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/** |
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* @param \ZipArchive $zip |
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* @param string $itemLocalPath |
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* @param string $existingFileMode |
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* @return bool Whether the file should be added to the archive or skipped |
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*/ |
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protected function shouldSkipFile($zip, $itemLocalPath, $existingFileMode) |
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{ |
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// Skip files if: |
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// - EXISTING_FILES_SKIP mode chosen |
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// - File already exists in the archive |
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return ($existingFileMode === self::EXISTING_FILES_SKIP && $zip->locateName($itemLocalPath) !== false); |
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} |
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/** |
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* Returns canonicalized absolute pathname, containing only forward slashes. |
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* |
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* @param string $path Path to normalize |
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* @return string Normalized and canonicalized path |
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*/ |
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protected function getNormalizedRealPath($path) |
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{ |
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$realPath = realpath($path); |
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return str_replace(DIRECTORY_SEPARATOR, '/', $realPath); |
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} |
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/** |
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* Closes the archive and copies it into the given stream |
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* |
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* @param \ZipArchive $zip An opened zip archive object |
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* @param resource $streamPointer Pointer to the stream to copy the zip |
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* @return void |
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*/ |
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public function closeArchiveAndCopyToStream($zip, $streamPointer) |
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{ |
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$zipFilePath = $zip->filename; |
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$zip->close(); |
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$this->copyZipToStream($zipFilePath, $streamPointer); |
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} |
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/** |
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* Streams the contents of the zip file into the given stream |
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* |
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* @param string $zipFilePath Path of the zip file |
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* @param resource $pointer Pointer to the stream to copy the zip |
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* @return void |
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*/ |
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protected function copyZipToStream($zipFilePath, $pointer) |
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{ |
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$zipFilePointer = fopen($zipFilePath, 'r'); |
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stream_copy_to_stream($zipFilePointer, $pointer); |
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fclose($zipFilePointer); |
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} |
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} |
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