php壓縮文件zip的例子
1.請先下載我准備好的zip.php工具類,下載後解壓,將裡面的文件放入對應的目錄中,我是放在虛擬目錄下的include文件夾中。
2.在你的php文件中加入下面代碼即可
用法:
require_once "./include/zip.php";
$zip = new PHPZip();
//$zip -> createZip("要壓縮的文件夾目錄地址", "壓縮後的文件名.zip"); //只生成不自動下載
$zip -> downloadZip("要壓縮的文件夾目錄地址", "壓縮後的文件名.zip"); //自動下載
實例:可以參考下面的偽代碼來看一個具體的使用場景: 代碼
require_once "./include/zip.php";
if (!$download) {
exit();
}
set_time_limit(60);
$tmpManager = new TmpManager(); //假設我們有一個類來完成後面的操作
$tempfolder = array();
$tempfile = array(); //假設我們是通過在頁面上選擇checkbox來下載已選的文件夾或文件,並一同打包
for($i = 0;$i < $checkboxnum;$i ) {
$value = ${"select".$i};
if ($value != ) {
$this_type = substr($value, 0, 1);
$this_id = substr($value, 1);
//將文件夾和文件的情況分開處理
if ($this_type == d) {
$tempfolder[] = $this_id;
}
elseif ($this_type == f) {
$tempfile[] = $this_id;
}
}
}
@mkdir($tempdir);
$curtempdir = "$tempdir/".$userid; //不同用戶在不同的臨時文件夾下操作
if (file_exists($curtempdir)) {
$tmpManager->DeleteDir($curtempdir); //刪除舊的文件夾
}
if (sizeof($tempfolder) > 0 || sizeof($tempfile) > 0) {
mkdir($curtempdir, 0777); //如果有要打包的文件貨文件夾,重新創建文件夾
}
if (sizeof($tempfile) > 0) {
$tmpManager->CopyFile($tempfile,$curtempdir); //將要下載的文件copy到創建的文件夾
}
if (sizeof($tempfolder) > 0) {
$tmpManager->CopyFolder($tempfolder,$curtempdir); //將要下載的文件夾copy到創建的文件夾
}
$zip = new PHPZip();
$zip -> downloadZip($curtempdir, "file_".date(Ymd).".zip");//打包並下載
壓縮類:
- <?php
- /*
- 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