php zip相关的类库很多，但个人觉得好用的不过，下面这个类是我从phpMyAdmin中提出来的，稍加改进，添加了addFilePath和saveAs两个方法。我觉得最方便的地方是，它能自动生成zip的文件结构，而不用预先创建。
类的代码也很简洁：
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 | <?php /* vim: set expandtab sw=4 ts=4 sts=4: */ /** * * @version $Id: zip.lib.php 10240 2007-04-01 11:02:46Z cybot_tm $ */</p> <p>/** * Zip file creation class. * Makes zip files. * * Based on : * * http://www.zend.com/codex.php?id=535&single=1 * By Eric Mueller <eric@themepark.com> * * http://www.zend.com/codex.php?id=470&single=1 * by Denis125 <webmaster@atlant.ru> * * a patch from Peter Listiak <mlady@users.sourceforge.net> for last modified * date and time of the compressed file * * Official ZIP file format: http://www.pkware.com/appnote.txt * * @access public */ class zipfile { /** * Array to store compressed data * * @var array $datasec */ var $datasec = array();</p> <p> /** * Central directory * * @var array $ctrl_dir */ var $ctrl_dir = array();</p> <p> /** * End of central directory record * * @var string $eof_ctrl_dir */ var $eof_ctrl_dir = "\x50\x4b\x05\x06\x00\x00\x00\x00";</p> <p> /** * Last offset position * * @var integer $old_offset */ var $old_offset = 0;</p> <p> /** * Converts an Unix timestamp to a four byte DOS date and time format (date * in high two bytes, time in low two bytes allowing magnitude comparison). * * @param integer the current Unix timestamp * * @return integer the current date in a four byte DOS format * * @access private */ function unix2DosTime($unixtime = 0) { $timearray = ($unixtime == 0) ? getdate() : getdate($unixtime);</p> <p> if ($timearray['year'] < 1980) { $timearray['year'] = 1980; $timearray['mon'] = 1; $timearray['mday'] = 1; $timearray['hours'] = 0; $timearray['minutes'] = 0; $timearray['seconds'] = 0; } // end if</p> <p> return (($timearray['year'] - 1980) << 25) | ($timearray['mon'] << 21) | ($timearray['mday'] << 16) | ($timearray['hours'] << 11) | ($timearray['minutes'] << 5) | ($timearray['seconds'] >> 1); } // end of the 'unix2DosTime()' method</p> <p> /** * Add By walktree 2009-8-24 * * Adds "file" to archive * * @param string file path * @param string name of the file in the archive (may contains the path) * * @access public */ function addFilePath($path,$name,$addOn = '') { if( file_exists($path) ){ $handle = fopen($path, "r"); $data = fread($handle, filesize ($path));</p> <p> if( !empty($addOn) ){ $data.= $addOn; } $this->addFile($data,$name,0); } }</p> <p> /** * Adds "file" to archive * * @param string file contents * @param string name of the file in the archive (may contains the path) * @param integer the current timestamp * * @access public */ function addFile($data, $name, $time = 0) { $name = str_replace('\\', '/', $name);</p> <p> $dtime = dechex($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 . '";');</p> <p> $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</p> <p> // "local file header" segment $unc_len = strlen($data); $crc = crc32($data); $zdata = gzcompress($data); $zdata = substr(substr($zdata, 0, strlen($zdata) - 4), 2); // fix crc bug $c_len = strlen($zdata); $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;</p> <p> // "file data" segment $fr .= $zdata;</p> <p> // "data descriptor" segment (optional but necessary if archive is not // served as file) // nijel(2004-10-19): this seems not to be needed at all and causes // problems in some cases (bug #1037737) //$fr .= pack('V', $crc); // crc32 //$fr .= pack('V', $c_len); // compressed filesize //$fr .= pack('V', $unc_len); // uncompressed filesize</p> <p> // add this entry to array $this -> datasec[] = $fr;</p> <p> // now 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</p> <p> $cdrec .= pack('V', $this -> old_offset); // relative offset of local header $this -> old_offset += strlen($fr);</p> <p> $cdrec .= $name;</p> <p> // optional extra field, file comment goes here // save to central directory $this -> ctrl_dir[] = $cdrec; } // end of the 'addFile()' method</p> <p> /** * Dumps out file * * @return string the zipped file * * @access public */ function file() { $data = implode('', $this -> datasec); $ctrldir = implode('', $this -> ctrl_dir);</p> <p> 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)) . // size of central dir pack('V', strlen($data)) . // offset to start of central dir "\x00\x00"; // .zip file comment length } // end of the 'file()' method</p> <p> function saveAs($path) { $dump_buffer = $this->file(); $fp = fopen($path,'wb+'); fwrite($fp,$dump_buffer); fclose($fp); }</p> <p>} // end of the 'zipfile' class ?> |