php4/php ZIP压缩、解压程序：dZip

############################################################## # Class dUnzip2 v2.2 # # Author: Alexandre Tedeschi (d) # E-Mail: alexandrebr at gmail dot com # Londrina - PR / Brazil # # Objective: # This class allows programmer to easily unzip files on the fly. # # Requirements: # This class requires extension ZLibEnabled. These are default # for most site hosts around the world, and for the PHP Win32 dist. ############################################################## -------------------- How does it work -------------------- ] The class open the give ZIP File, and move the internal pointer ] to list all the files zipped on it. The returned values are ] stored in the public variable 'compressedList'. These can be ] returned by the public method 'getList()'. ] ] It also has Central Directory support. Means that the ZIP may contain ] additional information for each file or directory, like external ] attributes and comments. The variables are stored in the public ] variable 'dirSignature'. These should be returned for each file ] by using the public method 'getExtraInfo(fileName)'. If no extra ] information available, the method will return 'false'. ] ] After getting file list, you may want to unzip some of them. There are ] two ways to do this... They are descripted below. ] ] You can also get ZIP file details like file comments by calling the ] method 'getZipInfo([detail])'. If you give 'detail' var, only the ] given information will be returned, else it will return everything. ] ] Warning: To use the ZIP file by another script, you must first free it ] from the dUnzip2 class. For this, call the method 'close()'... It is ] auto-called on class destroyed (if PHP5), and terminate the file handler. ------------------- Unzipping files ------------------- - Method 'unzip(fileName[, targetFileName])' ] Unzip given filename. ] If 'targetFileName' is given, the class will output extracted file ] to that file. If FALSE, extracted file will be returned to variable. - Method 'unzipAll([targetDir[, baseDir[, maintainStructure]]])' ] Unzip all the files in the compressed file, to the 'targetDir' folder. ] If not given, actual directory will be used. ] If 'baseDir', only files compressed in the given directory of the ZIP ] file will be extracted. If not, all the files compressed will be unzipped. ] If 'maintainStructure' is FALSE, then the zip structure will be disabled. ] Default is TRUE, class will auto-create subfolders to hold files. -------------------------------------------------- Understanding internal and external_attributes (Both returned by using method getExtraInfo) -------------------------------------------------- - Internal attribute ] "The lowest bit of this field indicates, if set, that the file is ] apparently an ASCII or text file. If not set, that the file apparently ] contains binary data. The remaining bits are unused in version 1.0." ] (source: http://www.pkware.com/download.html) - External attributes ] First thing, is noting that these are O.S. dependent, so there aren't ] any rules.. ] ] By myself, I divided this into two different things: ] * external_attributes1 ] * external_attributes2 ] ] Actually, I don't have idea on what does the external_attributes2 ] represents, so let's talk only about the first one. ] ] I've made some tests on WindowsXP, and here are the results obtained. ] * bit1: Read-Only attribute ] * bit2: Hidden attribute ] * bit3: System attribute ] * bit4: Volume Label (not used) ] * bit5: Directory attribute ] * bit6: Archive attribute ] ] To access the bits, use the following code: ] $d = $zip->getExtraInfo('file.txt'); ] echo ($d['external_attributes1']&1 )?"File is read-only.":"File is writeable."; ] echo ($d['external_attributes1']&2 )?"File is hidden.":"File is not hidden."; ] echo ($d['external_attributes1']&32)?"Archive attrib is set.":"Archive attrib not set."; ------------ Examples ------------ Using this class, you can: - List all the files compressed in a zip file, without overloading memory. - Uncompress any files on it. - Support to subfolders - Easily unzip a file maintaing all the directory structure Using this class, you cannot: - Zip files dinamically - Modify your zip files There are SO MANY classes around the internet to do this. (also, I've created a class dZip to do this, you can use it if you like it) How to use? $zip = new dUnzip("file_to_unzip.zip"); $zip->debug = 1; // debug? Then, choose one way... # List all the files compressed # getList(void) $list = $zip->getList(); foreach($list as $fileName=>$zippedFile) echo "$fileName ($zippedFile[uncompressed_size] bytes)<br>"; # Unzip some file: # unzip($fileName [,$targetFilename]) echo $zip->unzip("test.txt"); // To a variable $zip->unzip("test.txt", "test.txt"); // To a filename # Unzip the whole ZIP file # unzipAll([$targetDir[, $baseDir[, $maintainStructure]]]) $zip->unzipAll('uncompressed');