PHP实现将多个文件压缩成zip格式并下载到本地的方法示例

open($zipname,ZipArchive::CREATE); if ($res === TRUE) { foreach ($files as $file) { //这里直接用原文件的名字进行打包，也可以直接命名，需要注意如果文件名字一样会导致后面文件覆盖前面的文件，所以建议重新命名 $new_filename = substr($file,strrpos($file,'/') + 1); $zip->addFile($file,$new_filename); } } //关闭文件 $zip->close();

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"); $content = fread ($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; } function GetFileList($dir) { if (file_exists($dir)) { $args = func_get_args(); $pref = $args[1]; $dh = opendir($dir); while($files = readdir($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 $old_offset = 0; /** * Converts an Unix timestamp to a four byte DOS date and time format (date * in high two bytes,time in low two bytes allowing magnitude comparison). * * @param integer the current Unix timestamp * * @return integer the current date in a four byte DOS format * * @access private */ function unix2DosTime($unixtime = 0) { $timearray = ($unixtime == 0) ? getdate() : getdate($unixtime); if ($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) | ($timearray['seconds'] >> 1); } // end of the 'unix2DosTime()' method /** * Adds "file" to archive * * @param string file contents * @param string name of the file in the archive (may contains the path) * @param integer the current timestamp * * @access public */ function addFile($data,$name,$time = 0) { $name = str_replace('','/',$name); $dtime = dechex($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,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 central directory record $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 central directory $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 -> 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)) . // size of central dir pack('V',strlen($data)) . // offset to start of central dir "x00x00"; // .zip file comment length } // end of the 'file()' method } // end of the 'PHPZip' class ?>

Zip($zipfiles,$zipfile);