php压缩文件zip的例子
1.请先下载我准备好的zip.php工具类，下载后解压，将里面的文件放入对应的目录中，我是放在虚拟目录下的include文件夹中。
2.在你的php文件中加入下面代码即可
用法：
require_once "./include/zip.php";
$zip = new PHPZip();
//$zip -> createZip("要压缩的文件夹目录地址", "压缩后的文件名.zip"); //只生成不自动下载
$zip -> downloadZip("要压缩的文件夹目录地址", "压缩后的文件名.zip"); //自动下载
实例：可以参考下面的伪代码来看一个具体的使用场景： 代码
require_once "./include/zip.php";
if (!$download) {
exit();
}
set_time_limit(60);
$tmpManager = new TmpManager(); //假设我们有一个类来完成后面的操作
$tempfolder = array();
$tempfile = array(); //假设我们是通过在页面上选择checkbox来下载已选的文件夹或文件，并一同打包
for($i = 0;$i < $checkboxnum;$i ) {
$value = ${"select".$i};
if ($value != ) {
$this_type = substr($value, 0, 1);
$this_id = substr($value, 1);
//将文件夹和文件的情况分开处理
if ($this_type == d) {
$tempfolder[] = $this_id;
}
elseif ($this_type == f) {
$tempfile[] = $this_id;
}
}
}
@mkdir($tempdir);
$curtempdir = "$tempdir/".$userid; //不同用户在不同的临时文件夹下操作
if (file_exists($curtempdir)) {
$tmpManager->DeleteDir($curtempdir); //删除旧的文件夹
}
if (sizeof($tempfolder) > 0 || sizeof($tempfile) > 0) {
mkdir($curtempdir, 0777); //如果有要打包的文件货文件夹，重新创建文件夹
}
if (sizeof($tempfile) > 0) {
$tmpManager->CopyFile($tempfile,$curtempdir); //将要下载的文件copy到创建的文件夹
}
if (sizeof($tempfolder) > 0) {
$tmpManager->CopyFolder($tempfolder,$curtempdir); //将要下载的文件夹copy到创建的文件夹
}
$zip = new PHPZip();
$zip -> downloadZip($curtempdir, "file_".date(Ymd).".zip");//打包并下载
压缩类:
- /*
- File name: /include/zip.php
- Author: Horace 2009/04/15
- */
- class PHPZip{
- var $dirInfo = array("0","0");
- var $rootDir = ;
- var $datasec = array();
- var $ctrl_dir = array();
- var $eof_ctrl_dir = "x50x4bx05x06x00x00x00x00";
- var $old_offset = 0;
- function downloadZip(){
- createZip($dir, $zipfilename, true);
- }
- function createZip($dir, $zipfilename, $autoDownload = false){
- if (@function_exists(gzcompress)){
- @set_time_limit("0");
- if (is_array($dir)){
- $fd = fopen ($dir, "r");
- $fileValue = fread ($fd, filesize ($filename));
- fclose ($fd);
- if (is_array($dir)) $filename = basename($dir);
- $this -> addFile($fileValue, "$filename");
- }else{
- $this->dirTree($dir,$dir);
- }
- $zipfilenametemp = time().$zipfilename;
- $out = $this -> filezip();
- $fp = fopen($zipfilenametemp, "w");
- fwrite($fp, $out, strlen($out));
- fclose($fp);
- $filesize = filesize($zipfilenametemp);
- if ($filesize < 104857600) {
- if($autoDownload){
- header("Content-type: application/octet-stream");
- header("Content-disposition: attachment; filename=".$zipfilename);
- }
- echo $this -> filezip();
- }else{
- echo "create zip error!";
- }
- unlink($zipfilenametemp);
- }
- }
- //get dir tree..
- function dirTree($directory,$rootDir){
- global $_SERVER,$dirInfo,$rootDir;
- $fileDir=$rootDir;
- $myDir=dir($directory);
- while($file=$myDir->read()){
- if(is_dir("$directory/$file") and $file!="." and $file!=".."){
- $dirInfo[0] ;
- $rootDir ="$fileDir$file/";
- $this -> addFile(, "$rootDir");
- //go on ns folders
- $this->dirTree("$directory/$file",$rootDir);
- }else{
- if($file!="." and $file!=".."){
- $dirInfo[1] ;
- //$fd = fopen ("$directory/$file", "r");
- $fileValue = file_get_contents("$directory/$file");
- //fclose ($fd);
- $this -> addFile($fileValue, "$fileDir$file");
- }
- }
- }
- $myDir->close();
- }
- function unix2DosTime($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) | ($timearray[seconds] >> 1);
- }
- function addFile($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
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