PHP file compression Phpzip Class usage Example

This article illustrates the Phpzip class usage of PHP file compression. Share to everyone for your reference. Specifically as follows:

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<?php////Phpzip v1.2 by Sext (sext@neud.net)///makes ZIP archive///Based on "Zip file Creation class", uses ZLib///class Phpzip {function Zip ($dir, $zipfilename) {if (@function_exists (' gzcompress ')) {$curdir = GETCWD (); if (Is_array ($dir)) {$filelist = $dir;} else {$filelist = $this-> getfilelist ($dir),} if (!empty ($dir) && (!is_array ($dir)) && (file_exists ($dir))) ChDir ($dir); else ChDir ($curdir); if (count ($filelist) >0) {foreach ($filelist as $filename) {if (Is_file ($filename)) {$fd = fopen ($filename, "R"); $co Ntent = Fread ($FD, FileSize ($filename)); Fclose ($FD); if (Is_array ($dir)) $filename = basename ($filename); $this-> addfile ($content, $filename); }} $out = $this-> file (); ChDir ($curdir); $fp = fopen ($zipfilename, "w"); Fwrite ($fp, $out, strlen ($out)); Fclose ($FP); return 1; else return 0; The function getfilelist ($dir) {if (file_exists ($dir)) {$args = Func_get_args (); $pref = $args [1]; $DH = Opendir ($dir); WH Ile$files = Readdir ($DH)) {if ($files!= ".") && ($files!= "...")) {if (Is_dir ($dir. $files)) {$curdir = GETCWD (); ChDir ($dir. $files); $file = Array_merge ($file, $this-> getfilelist ("" , "$pref $files/")); ChDir ($curdir); else $file []= $pref. $files; } closedir ($DH); return $file; var $datasec = array (); var $ctrl _dir = Array (); var $eof _ctrl_dir = "x50x4bx05x06x00x00x00x00"; var $old _offset = 0; /** * Converts a Unix timestamp to a four byte DOS date and time format (date * in high two bytes, time in low two bytes allowing magnitude comparison). * @param integer The current Unix timestamp * * @return integer The current date in a four byte DOS format * * @access P Rivate/function unix2dostime ($unixtime = 0) {$timearray = ($unixtime = = 0)? getdate (): getdate ($unixtime); if ($time array[' Year '] < 1980} {$timearray [' year '] = 1980; $timearray [' mon '] = 1; $timearray [' mday '] = 1; $timearray [' hours '] = 0; $timearray [' minutes '] = 0; $timearray [' seconds '] = 0; }//End IfReturn (($timearray [' Year ']-1980) << 25) | ($timearray [' mon '] << 21) | ($timearray [' Mday '] << 16) | ($timearray [' hours '] << 11) | ($timearray [' minutes '] << 5) | ($timearray [' seconds '] >> 1); //End of the ' unix2dostime () ' Method/** * Adds "file" to archive * * @param string file contents * @param string name The "File in" archive (may contains the path) * @param an integer the current timestamp * * @access public/function A Ddfile ($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); $zdata = substr (substr ($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 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 the $cdrec = "x50x4bx01x02"; $cdrec. = "x00x00"; Version made by $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 goes here//save to $this-> ctrl_dir[] = $cdrec; //End of the ' AddFile () ' method/** * Dumps out file * * @return String The zipped file * * @access public * * function File () {$data = Implode (', $this-> datasec); $ctrldir = Implode (", $this-&Gt CTRL_DIR);   Return $data. $ctrldir. $this-> Eof_ctrl_dir. Pack (' V ', sizeof ($this-> ctrl_dir)). Total # of Entries "on this disk" pack (' V ', sizeof ($this-> ctrl_dir)). Total # of Entries Overall pack (' V ', strlen ($ctrldir)). The size of the???. Dir Pack (' V ', strlen ($data)). Offset to start of the "x00x00"; . zip file Comment Length}//End of the ' file () ' method}//End of the ' Phpzip ' class?>

How to use:

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<?php $z = new Phpzip (); New to build a zip class//Method One: $z-> zip ("", "Out1.zip"); Add all files under current directory and subdirectory/method two: $files =array (' 1.txt ', ' gb.txt '); $files []= ' 5.txt]; $z-> Zip ($files, "out2.zip"); Add File List//method three: $z-> Zip ("/usr/local/sext/", "Out3.zip"); Add specified directory?>

I hope this article will help you with your PHP program design.