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 (sext@neud.net) 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 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
?>
用法：
$zipfiles =array(\"/root/pooy/test1.txt\",\"/root/pooy/test2.txt\"); $z = new PHPZip(); //$randomstr = random(8); $zipfile = TEMP.\"/photocome_\".$groupid.\".zip\"; $z->Zip($zipfiles, $zipfile);
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希望本文所述对大家PHP程序设计有所帮助。
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