How to use PHP to generate zip compressed files with detailed code

The code is as follows:

Require_once "./include/zip.php"; $zip = new Phpzip ();　　 $zip-Createzip ("folder directory address to compress", "compressed file name. zip");　　Generate only non-automatic downloads $zip-downloadzip ("folder directory address to compress", "compressed file name. zip"); Automatic download

Example: You can refer to the following pseudo-code to see a specific usage scenario:

The code is as follows:

Require_once "./include/zip.php"; if (! $download) {exit ();} set_time_limit (60); $tmpManager = new Tmpmanager (); Suppose we have a class to do the following $tempfolder = Array (); $tempfile = Array (); Let's say we download the selected folder or file by selecting the checkbox on the page, and package for ($i = 0; $i < $checkboxnum; $i + +) {$value = ${"select". $i}; if ($value! = ' ') {$this _type = substr ($value, 0, 1), $this _id = substr ($value, 1);//separate folder and file processing if ($this _type = = ' d ') {$tempfolde r[] = $this _id; } elseif ($this _type = = ' F ') {$tempfile [] = $this _id;}} } @mkdir ($tempdir); $curtempdir = "$tempdir/". $userid; Different users operate under different temporary folders if (file_exists ($curtempdir)) {$tmpManager->deletedir ($curtempdir);//delete old folder} if (sizeof ($ TempFolder) > 0 | | sizeof ($tempfile) > 0) {mkdir ($curtempdir, 0777);//If you have a file folder to package, re-create the folder} if (sizeof ($tempfile) > 0) {$tmpManage R->copyfile ($tempfile, $curtempdir); Copy the file you want to download to the folder you created} if (sizeof ($tempfolder) > 0) {$tmpManager->copyfolder ($tempfolder, $curtempdir); Copy the folder you want to download to the folder you created} $zip = new Phpzip(); $zip-Downloadzip ($curtempdir, "File_". Date (' Ymd '). ". Zip "); Package and download

zip.php

The code is as follows:

<?php/* File name:/include/zip.php author:horace 2009/04/15 */class phpzip{var $dirInfo = Array ("0", "0"), var $roo Tdir = "; var $datasec = array (); var $ctrl _dir = Array (); var $eof _ctrl_dir = "/x50/x4b/x05/x06/x00/x00/x00/x00"; var $old _offset = 0; function Downloadzip () {createzip ($dir, $zipfilename, True),} function Createzip ($dir, $zipfilename, $autoDownload = FAL  SE) {if (@function_exists (' gzcompress ')) {@set_time_limit ("0"), if (Is_array ($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 n ' s 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 [' Y Ear '] < 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 = "/x50/x4b/x03/x04"; $fr. = "/x14/x00"; Ver needed to extract $fr. = "/x00/x00"; Gen purpose bit flag $fr. = "/x08/x00"; 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); $zdata = substr (substr ($zdata, 0, strlen ($zdata)-4), 2); Fix 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 are 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 the add to central directory record $cdrec = "/x50/x4b/x01/x02"; $cdrec. = "/x00/x00"; Version made by $cdrec. = "/x14/x00"; Version needed to extract $cdrec. = "/x00/x00"; Gen purpose bit flag $cdrec. = "/x08/x00"; 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 the local header $this-old_offset = $new _offset; $cdrec. = $name; Optional extra field, file comment goes here//save to Central directory $this, ctrl_dir[] = $cdrec;  } function Filezip () {$data = Implode (", $this-datasec); $ctrldir = Implode (", $this-Ctrl_dir); return $data . $ctrldir. Eof_ctrl_dir, $this. Pack (' V ', sizeof ($this-Ctrl_dir)). Total # of Entries "on this disk" pack (' V ', sizeof ($this-Ctrl_dir)). Total # of Entries Overall pack (' V ', strlen ($ctrldir)). Size of CentraL dir Pack (' V ', strlen ($data)). Offset to start of the central dir "/x00/x00"; . zip file comment length}}?>

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