Example 1. download the prepared zip file first. php tool class. after downloading and decompressing the file, put the file in the corresponding directory. I put it in the include folder under the virtual directory. 2. add the following code to your php file: require_once./include/zip. php; $ zipnewPHS php compressed file zip example
1. download the zip. php tool class that I have prepared, decompress it, and put the files in the directory. I put the files in the include folder under the virtual directory.
2. add the following code to your php file:
Usage:
Require_once "./include/zip. php ";
$ Zip = new PHPZip ();
// $ Zip-> createZip ("directory address of the folder to be compressed", "file name .zip"); // only generate files that are not automatically downloaded
$ Zip-> downloadZip ("directory address of the folder to be compressed", "file name .zip"); // automatically download
Example: You can refer to the following pseudocode to see a specific use case: code
Require_once "./include/zip. php ";
If (! $ Download ){
Exit ();
}
Set_time_limit (60 );
$ TmpManager = new TmpManager (); // assume that we have a class to complete subsequent operations.
$ Tempfolder = array ();
$ Tempfile = array (); // suppose we download the selected folder or file by selecting checkbox on the page and package it together
For ($ I = 0; $ I <$ checkboxnum; $ I ){
$ Value =$ {"select". $ I };
If ($ value! = ){
$ This_type = substr ($ value, 0, 1 );
$ This_id = substr ($ value, 1 );
// Separate folders and files
If ($ this_type = d ){
$ Tempfolder [] = $ this_id;
}
Elseif ($ this_type = f ){
$ Tempfile [] = $ this_id;
}
}
}
@ Mkdir ($ tempdir );
$ Curtempdir = "$ tempdir/". $ userid; // different users operate in different temporary folders
If (file_exists ($ curtempdir )){
$ TmpManager-> DeleteDir ($ curtempdir); // delete the old folder
}
If (sizeof ($ tempfolder)> 0 | sizeof ($ tempfile)> 0 ){
Mkdir ($ curtempdir, 0777); // re-create a folder if there is a folder for packaging objects
}
If (sizeof ($ tempfile)> 0 ){
$ TmpManager-> CopyFile ($ tempfile, $ curtempdir); // copy the file to be downloaded to the created folder.
}
If (sizeof ($ tempfolder)> 0 ){
$ TmpManager-> CopyFolder ($ tempfolder, $ curtempdir); // copy the folder to be downloaded to the created folder
}
$ Zip = new PHPZip ();
$ Zip-> downloadZip ($ curtempdir, "file _". date (Ymd). ". zip"); // package and download
Compression class:
-
- /*
- File name:/include/zip. php
- Author: hsf-e 2009/04/15
- */
- Class PHPZip {
- Var $ dirInfo = array ("0", "0 ");
- Var $ rootDir =;
- Var $ datasec = array ();
- Var $ ctrl_dir = array ();
- Var $ eof_ctrl_dir = "x50x4bx05x06x00x00x00x00 ";
- Var $ old_offset = 0;
- Function downloadZip (){
- CreateZip ($ dir, $ zipfilename, true );
- }
- Function createZip ($ dir, $ zipfilename, $ autoDownload = false ){
- If (@ function_exists (gzcompress )){
- @ Set_time_limit ("0 ");
- If (is_array ($ dir )){
- $ Fd = fopen ($ dir, "r ");
- $ FileValue = fread ($ fd, filesize ($ filename ));
- Fclose ($ fd );
- If (is_array ($ dir) $ filename = basename ($ dir );
- $ This-> addFile ($ fileValue, "$ filename ");
- } Else {
- $ This-> dirTree ($ dir, $ dir );
- }
- $ Zipfilenametemp = time (). $ zipfilename;
- $ Out = $ this-> filezip ();
- $ Fp = fopen ($ zipfilenametemp, "w ");
- Fwrite ($ fp, $ out, strlen ($ out ));
- Fclose ($ fp );
- $ Filesize = filesize ($ zipfilenametemp );
- If ($ filesize <104857600 ){
- If ($ autoDownload ){
- Header ("Content-type: application/octet-stream ");
- Header ("Content-disposition: attachment; filename =". $ zipfilename );
- }
- Echo $ this-> filezip ();
- } Else {
- Echo "create zip error! ";
- }
- Unlink ($ zipfilenametemp );
- }
- }
- // Get dir tree ..
- Function dirTree ($ directory, $ rootDir ){
- Global $ _ SERVER, $ dirInfo, $ rootDir;
- $ FileDir = $ rootDir;
- $ MyDir = dir ($ directory );
- While ($ file = $ myDir-> read ()){
- If (is_dir ("$ directory/$ file") and $ file! = "." And $ file! = ".."){
- $ DirInfo [0];
- $ RootDir = "$ fileDir $ file /";
- $ This-> addFile (, "$ rootDir ");
- // Go on ns folders
- $ This-> dirTree ("$ directory/$ file", $ rootDir );
- } Else {
- If ($ file! = "." And $ file! = ".."){
- $ DirInfo [1];
- // $ Fd = fopen ("$ directory/$ file", "r ");
- $ FileValue = file_get_contents ("$ directory/$ file ");
- // Fclose ($ fd );
- $ This-> addFile ($ fileValue, "$ fileDir $ file ");
- }
- }
- }
- $ MyDir-> close ();
- }
- Function unix2DosTime ($ unixtime = 0 ){
- $ Timearray = ($ unixtime = 0 )? Getdate (): getdate ($ unixtime );
- If ($ timearray [year] <1980 ){
- $ Timearray [year] = 1980;
- $ Timearray [mon] = 1;
- $ Timearray [mday] = 1;
- $ Timearray [hours] = 0;
- $ Timearray [minutes] = 0;
- $ Timearray [seconds] = 0;
- } // End if
- Return ($ timearray [year]-1980) <25) | ($ timearray [mon] <21) | ($ timearray [mday] <16) |
- ($ Timearray [hours] <11) | ($ timearray [minutes] <5) | ($ timearray [seconds]> 1 );
- }
- Function addFile ($ data, $ name, $ time = 0 ){
- $ Name = str_replace (,/, $ name );
- $ Dtime = dechex ($ this-> unix2DosTime ($ time ));
- $ Hexdtime = x. $ dtime [6]. $ dtime [7]
- . X. $ dtime [4]. $ dtime [5]
- . X. $ dtime [2]. $ dtime [3]
- . X. $ dtime [0]. $ dtime [1];
- Eval ($ hexdtime = ". $ hexdtime .";);
- $ Fr = "x50x4bx03x04 ";
- $ Fr. = "x14x00"; // ver needed to extract
- $ Fr. = "x00x00"; // gen purpose bit flag
- $ Fr. = "x08x00"; // compression method
- $ Fr. = $ hexdtime; // last mod time and date
- // "Local file header" segment
- $ Unc_len = strlen ($ data );
- $ Crc = crc32 ($ data );
- $ Zdata = gzcompress ($ data );
- $ C_len = strlen ($ zdata );
- $ Zdata = substr ($ zdata, 0, strlen ($ zdata)-4), 2); // fix the crc bug
- $ Fr. = pack (V, $ crc); // crc32
- $ Fr. = pack (V, $ c_len); // compressed filesize
- $ Fr. = pack (V, $ unc_len); // uncompressed filesize
- $ Fr. = pack (v, strlen ($ name); // length of filename
- $ Fr. = pack (v, 0); // extra field length
- $ Fr. = $ name;
- // "File data" segment
- $ Fr. = $ zdata;
- // "Data descriptor" segment (optional but necessary if archive is not
- // Served as file)
- $ Fr. = pack (V, $ crc); // crc32
- $ Fr. = pack (V, $ c_len); // compressed filesize
- $ Fr. = pack (V, $ unc_len); // uncompressed filesize
- // Add this entry to array
- $ This-> datasec [] = $ fr;
- $ New_offset = strlen (implode (, $ this-> datasec ));
- // Now add to central directory record
- $ Cdrec = "x50x4bx01x02 ";
- $ Cdrec. = "x00x00"; // version made
- $ Cdrec. = "x14x00"; // version needed to extract
- $ Cdrec. = "x00x00"; // gen purpose bit flag
- $ Cdrec. = "x08x00"; // compression method
- $ Cdrec. = $ hexdtime; // last mod time & date
- $ Cdrec. = pack (V, $ crc); // crc32
- $ Cdrec. = pack (V, $ c_len); // compressed filesize
- $ Cdrec. = pack (V, $ unc_len); // uncompressed filesize
- $ Cdrec. = pack (v, strlen ($ name); // length of filename
- $ Cdrec. = pack (v, 0); // extra field length
- $ Cdrec. = pack (v, 0); // file comment length
- $ Cdrec. = pack (v, 0); // disk number start
- $ Cdrec. = pack (v, 0); // internal file attributes
- $ Cdrec. = pack (V, 32); // external file attributes-archive bit set
- $ Cdrec. = pack (V, $ this-> old_offset); // relative offset of local header
- $ This-> old_offset = $ new_offset;
- $ Cdrec. = $ name;
- // Optional extra field, file comment