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 $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
zip.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 = "/x50/x4b/x05/x06/x00/x00/x00/x00";
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 ($filesize if($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 n's 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'] $timearray['year'] = 1980;
$timearray['mon'] = 1;
$timearray['mday'] = 1;
$timearray['hours'] = 0;
$timearray['minutes'] = 0;
$timearray['seconds'] = 0;
} // end if
return (($timearray['year'] - 1980) ($timearray['hours'] > 1);
}
function addFile($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
}
}
?>

What’s still popular is the ease of use, flexibility and a strong ecosystem. 1) Ease of use and simple syntax make it the first choice for beginners. 2) Closely integrated with web development, excellent interaction with HTTP requests and database. 3) The huge ecosystem provides a wealth of tools and libraries. 4) Active community and open source nature adapts them to new needs and technology trends.

PHP and Python are both high-level programming languages that are widely used in web development, data processing and automation tasks. 1.PHP is often used to build dynamic websites and content management systems, while Python is often used to build web frameworks and data science. 2.PHP uses echo to output content, Python uses print. 3. Both support object-oriented programming, but the syntax and keywords are different. 4. PHP supports weak type conversion, while Python is more stringent. 5. PHP performance optimization includes using OPcache and asynchronous programming, while Python uses cProfile and asynchronous programming.

PHP is mainly procedural programming, but also supports object-oriented programming (OOP); Python supports a variety of paradigms, including OOP, functional and procedural programming. PHP is suitable for web development, and Python is suitable for a variety of applications such as data analysis and machine learning.

PHP originated in 1994 and was developed by RasmusLerdorf. It was originally used to track website visitors and gradually evolved into a server-side scripting language and was widely used in web development. Python was developed by Guidovan Rossum in the late 1980s and was first released in 1991. It emphasizes code readability and simplicity, and is suitable for scientific computing, data analysis and other fields.

PHP is suitable for web development and rapid prototyping, and Python is suitable for data science and machine learning. 1.PHP is used for dynamic web development, with simple syntax and suitable for rapid development. 2. Python has concise syntax, is suitable for multiple fields, and has a strong library ecosystem.

PHP remains important in the modernization process because it supports a large number of websites and applications and adapts to development needs through frameworks. 1.PHP7 improves performance and introduces new features. 2. Modern frameworks such as Laravel, Symfony and CodeIgniter simplify development and improve code quality. 3. Performance optimization and best practices further improve application efficiency.

PHPhassignificantlyimpactedwebdevelopmentandextendsbeyondit.1)ItpowersmajorplatformslikeWordPressandexcelsindatabaseinteractions.2)PHP'sadaptabilityallowsittoscaleforlargeapplicationsusingframeworkslikeLaravel.3)Beyondweb,PHPisusedincommand-linescrip

PHP type prompts to improve code quality and readability. 1) Scalar type tips: Since PHP7.0, basic data types are allowed to be specified in function parameters, such as int, float, etc. 2) Return type prompt: Ensure the consistency of the function return value type. 3) Union type prompt: Since PHP8.0, multiple types are allowed to be specified in function parameters or return values. 4) Nullable type prompt: Allows to include null values and handle functions that may return null values.


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