基于PHP实现的WEB图片共享系统(源代码)

Documentation for class Archive_Tar =================================== Last update : 2001-08-15 Overview : ---------- The Archive_Tar class helps in creating and managing GNU TAR format files compressed by GNU ZIP or not. The class offers basic functions like creating an archive, adding files in the archive, extracting files from the archive and listing the archive content. It also provide advanced functions that allow the adding and extraction of files with path manipulation. Sample : -------- // ----- Creating the object (uncompressed archive) $tar_object = new Archive_Tar("tarname.tar"); $tar_object->setErrorHandling(PEAR_ERROR_PRINT); // ----- Creating the archive $v_list[0]="file.txt"; $v_list[1]="data/"; $v_list[2]="file.log"; $tar_object->create($v_list); // ----- Adding files $v_list[0]="dev/file.txt"; $v_list[1]="dev/data/"; $v_list[2]="log/file.log"; $tar_object->add($v_list); // ----- Adding more files $tar_object->add("release/newfile.log release/readme.txt"); // ----- Listing the content if (($v_list = $tar_object->listContent()) != 0) for ($i=0; $i<sizeof($v_list); $i++) { echo "Filename :'".$v_list[$i][filename]."'<br>"; echo " .size :'".$v_list[$i][size]."'<br>"; echo " .mtime :'".$v_list[$i][mtime]."' (".date("l dS of F Y h:i:s A", $v_list[$i][mtime]).")<br>"; echo " .mode :'".$v_list[$i][mode]."'<br>"; echo " .uid :'".$v_list[$i][uid]."'<br>"; echo " .gid :'".$v_list[$i][gid]."'<br>"; echo " .typeflag :'".$v_list[$i][typeflag]."'<br>"; } // ----- Extracting the archive in directory "install" $tar_object->extract("install"); Public arguments : ------------------ None Public Methods : ---------------- Method : Archive_Tar($p_tarname, $compress = null) Description : Archive_Tar Class constructor. This flavour of the constructor only declare a new Archive_Tar object, identifying it by the name of the tar file. If the compress argument is set the tar will be read or created as a gzip or bz2 compressed TAR file. Arguments : $p_tarname : A valid filename for the tar archive file. $p_compress : can be null, 'gz' or 'bz2'. For compatibility reason it can also be true. This parameter indicates if gzip or bz2 compression is required. Return value : The Archive_Tar object. Sample : $tar_object = new Archive_Tar("tarname.tar"); $tar_object_compressed = new Archive_Tar("tarname.tgz", true); How it works : Initialize the object. Method : create($p_filelist) Description : This method creates the archive file and add the files / directories that are listed in $p_filelist. If the file already exists and is writable, it is replaced by the new tar. It is a create and not an add. If the file exists and is read-only or is a directory it is not replaced. The method return false and a PEAR error text. The $p_filelist parameter can be an array of string, each string representing a filename or a directory name with their path if needed. It can also be a single string with names separated by a single blank. See also createModify() method for more details. Arguments : $p_filelist : An array of filenames and directory names, or a single string with names separated by a single blank space. Return value : true on success, false on error. Sample 1 : $tar_object = new Archive_Tar("tarname.tar"); $tar_object->setErrorHandling(PEAR_ERROR_PRINT); // Optional error handling $v_list[0]="file.txt"; $v_list[1]="data/"; (Optional '/' at the end) $v_list[2]="file.log"; $tar_object->create($v_list); Sample 2 : $tar_object = new Archive_Tar("tarname.tar"); $tar_object->setErrorHandling(PEAR_ERROR_PRINT); // Optional error handling $tar_object->create("file.txt data/ file.log"); How it works : Just calling the createModify() method with the right parameters. Method : createModify($p_filelist, $p_add_dir, $p_remove_dir = "") Description : This method creates the archive file and add the files / directories that are listed in $p_filelist. If the file already exists and is writable, it is replaced by the new tar. It is a create and not an add. If the file exists and is read-only or is a directory it is not replaced. The method return false and a PEAR error text. The $p_filelist parameter can be an array of string, each string representing a filename or a directory name with their path if needed. It can also be a single string with names separated by a single blank. The path indicated in $p_remove_dir will be removed from the memorized path of each file / directory listed when this path exists. By default nothing is removed (empty path "") The path indicated in $p_add_dir will be added at the beginning of the memorized path of each file / directory listed. However it can be set to empty "". The adding of a path is done after the removing of path. The path add/remove ability enables the user to prepare an archive for extraction in a different path than the origin files are. See also addModify() method for file adding properties. Arguments : $p_filelist : An array of filenames and directory names, or a single string with names separated by a single blank space. $p_add_dir : A string which contains a path to be added to the memorized path of each element in the list. $p_remove_dir : A string which contains a path to be removed from the memorized path of each element in the list, when relevant. Return value : true on success, false on error. Sample 1 : $tar_object = new Archive_Tar("tarname.tar"); $tar_object->setErrorHandling(PEAR_ERROR_PRINT); // Optional error handling $v_list[0]="file.txt"; $v_list[1]="data/"; (Optional '/' at the end) $v_list[2]="file.log"; $tar_object->createModify($v_list, "install"); // files are stored in the archive as : // install/file.txt // install/data // install/data/file1.txt // install/data/... all the files and sub-dirs of data/ // install/file.log Sample 2 : $tar_object = new Archive_Tar("tarname.tar"); $tar_object->setErrorHandling(PEAR_ERROR_PRINT); // Optional error handling $v_list[0]="dev/file.txt"; $v_list[1]="dev/data/"; (Optional '/' at the end) $v_list[2]="log/file.log"; $tar_object->createModify($v_list, "install", "dev"); // files are stored in the archive as : // install/file.txt // install/data // install/data/file1.txt // install/data/... all the files and sub-dirs of data/ // install/log/file.log How it works : Open the file in write mode (erasing the existing one if one), call the _addList() method for adding the files in an empty archive, add the tar footer (512 bytes block), close the tar file. Method : addModify($p_filelist, $p_add_dir, $p_remove_dir="") Description : This method add the files / directories listed in $p_filelist at the end of the existing archive. If the archive does not yet exists it is created. The $p_filelist parameter can be an array of string, each string representing a filename or a directory name with their path if needed. It can also be a single string with names separated by a single blank. The path indicated in $p_remove_dir will be removed from the memorized path of each file / directory listed when this path exists. By default nothing is removed (empty path "") The path indicated in $p_add_dir will be added at the beginning of the memorized path of each file / directory listed. However it can be set to empty "". The adding of a path is done after the removing of path. The path add/remove ability enables the user to prepare an archive