这篇文章主要介绍了PHP实现将多个文件压缩成zip格式并下载到本地的方法,涉及php针对文件与目录的读写、判断与zip压缩相关操作技巧,需要的朋友可以参考下
本文实例讲述了PHP实现将多个文件压缩成zip格式并下载到本地的方法。分享给大家供大家参考，具体如下：
废话不多说，直接上代码
//这里需要注意该目录是否存在，并且有创建的权限$zipname = 'path/test.zip'//这是要打包的文件地址数组$files = array("mypath/test1.txt","mypath/test2.pdf");$zip = new ZipArchive();$res = $zip->open($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();
//这里是下载zip文件header("Content-Type: application/zip");header("Content-Transfer-Encoding: Binary");header("Content-Length: " . filesize($zipname));header("Content-Disposition: attachment; filename=\"" . basename($zipname) . "\"");readfile($zipname);exit;
附：这里再为大家提供一个zip压缩类：
<?php# # PHPZip v1.2 by Sext ([email protected]) 2002-11-18# (Changed: 2003-03-01)# # Makes zip archive## Based on "Zip file creation class", uses zLib##class PHPZip{ function Zip($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"); $content = fread ($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, 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 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', $unc_len); // uncompressed filesiz<i>1本文来#源gaodai$ma#com搞$代*码*网</i><pre>搞代gaodaima码
e $cdrec .= pack('v', strlen($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?>
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