php打包文件夹代码实现

有时候你想要打包一个网站的shell，但是没有权限执行tar等命令打包网站的代码时，可以使用php编写打包程序，打包网站的代码。

如果网站自带有ZipArchive类，那么就容易编写了，只要调用这个类，就可以直接打包文件夹了。demo如下

<?php

function addFileToZip($path,$zip){
    $handler = opendir($path);
    while(($filename=readdir($handler))!==false) {
        if($filename != "." && $filename != "..") {
            if(is_dir($path."/".$filename)) {
                addFileToZip($path."/".$filename, $zip);
            }else {
                $zip->addFile($path."/".$filename);
            }
        }
    }
    @closedir($path);
}


$zip=new ZipArchive();
$zipname = $_GET['name'];
$path = $_GET['path'];
if (isset($zipname) && isset($path)) {
    if($zip->open($zipname.".zip", ZipArchive::OVERWRITE) === TRUE) { 
        addFileToZip($path, $zip); //调用方法，对要打包的根目录进行操作，并将ZipArchive的对象传递给方法
        $zip->close(); //关闭处理的zip文件
    } 
}else {
    print('请输入文件名和文件夹路径');
}

?>

但是php安装时候并不会直接安装zip扩展，需要手动编译安装，所以如果没有ZipArchive类，可以自己用php自带函数实现zip的压缩功能。demo如下

<?php

error_reporting(0);

class PHPZip{
    var $dirInfo = array("0","0");
    var $datasec = array();
    var $ctrl_dir = array();
    var $eof_ctrl_dir = "\x50\x4b\x05\x06\x00\x00\x00\x00";
    var $old_offset   = 0;

    function createZip($dir, $zipfilename){
        if (@function_exists('gzcompress')){
            @set_time_limit("0");
            if (is_array($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);
            }

            $out = $this -> filezip();
            $fp = fopen($zipfilename, "w");
            fwrite($fp, $out, strlen($out));
            fclose($fp);
            $filesize = filesize($zipfilename);

            if ($filesize < 104857600) {
                echo "create zip success!";
            } else {
                echo "create zip error!";
            }        }
     }

    //get dir tree..
    function dirTree($directory,$rootDir){
        $fileDir = $rootDir;
        $myDir = dir($directory);
        while($file=$myDir->read()){
            if(is_dir("$directory/$file") and $file!="." and $file!=".."){
                $this->dirInfo[0]++;
                $rootDir ="$fileDir$file/";
                $this -> addFile('', "$rootDir");

                //go on n's folders
                $this->dirTree("$directory/$file",$rootDir);
            }else{
                if($file!="." and $file!=".."){
                    $this->dirInfo[1]++;
                    $fileValue = file_get_contents("$directory/$file");
                    $this -> addFile($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 = "\x50\x4b\x03\x04";
        $fr .= "\x14\x00";            // ver needed to extract
        $fr .= "\x00\x00";            // gen purpose bit flag
        $fr .= "\x08\x00";            // 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 = "\x50\x4b\x01\x02";
        $cdrec .= "\x00\x00";                // version made by
        $cdrec .= "\x14\x00";                // version needed to extract
        $cdrec .= "\x00\x00";                // gen purpose bit flag
        $cdrec .= "\x08\x00";                // 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;
    }

    function filezip(){
        $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
            "\x00\x00";                             // .zip file comment length
    }
}

$zip = new PHPZip(); 
$path = $_GET['path'];
$filename = $_GET['filename'];
if (isset($path)&&isset($filename)) {
    $zip -> createZip($path, $filename);
} else {
    echo "please input correct path and filename, like <a href=#>http://example.com?path=/home&filename=home.zip</a>";
}

?>

已把文件上传到github，下载地址 https://github.com/he1m4n6a/toolkit/blob/master/zip.php