问题
Before marking this post as a duplicate, please note that I have already searched for answer on SO and the once I've found so far (listed below) haven't been exactly what I've been looking for.
- How to [recursively] Zip a directory in PHP?
- using zipArchive addFile() will not add image to zip
- ZipArchive - addFile won't work
Those are just some of the ones I've looked at.
My problem is this: I can't use addFromString, I have to use addFile, it's a requirement of the task.
I've already tried a couple of ways, here's my current iteration:
public function getZippedFiles($path)
{
$real_path = WEBROOT_PATH.$path;
$files = new RecursiveIteratorIterator (new RecursiveDirectoryIterator($real_path), RecursiveIteratorIterator::LEAVES_ONLY);
//# create a temp file & open it
$tmp_file = tempnam($real_path,'');
$zip_file = preg_replace('"\.tmp$"', '.zip', $tmp_file);
$zip = new ZipArchive();
$zip->open($zip_file, ZipArchive::CREATE);
foreach ($files as $name=>$file)
{
error_log(print_r($name, true));
error_log(print_r($file, true));
if ( ($file == ".") || ($file == "..") )
{
continue;
}
$file_path = $file->getRealPath();
$zip->addFile($file_path);
}
$zip->close();
}
When I try to open the resulting file, I get told that "Windows cannot open the folder. The Compressed(zipped) Folder '' is invalid."
I've managed to succesfully complete the task using addFromString, like so:
$file_path = WEBROOT_PATH.$path;
$files = array();
if (is_dir($file_path) == true)
{
if ($handle = opendir($file_path))
{
while (($file = readdir($handle)) !== false)
{
if (is_dir($file_path.$file) == false)
{
$files[] = $file_path."\\".$file;
}
}
//# create new zip opbject
$zip = new ZipArchive();
//# create a temp file & open it
$tmp_file = tempnam($file_path,'');
$zip_file = preg_replace('"\.tmp$"', '.zip', $tmp_file);
$zip->open($zip_file, ZipArchive::CREATE);
//# loop through each file
foreach($files as $file){
//# download file
$download_file = file_get_contents($file);
//#add it to the zip
$zip->addFromString(basename($file),$download_file);
}
//# close zip
$zip->close();
}
}
}
The above is mostly just copied straight from some example code I saw somewhere. If anyone can point me in a good direction I'd be very grateful!
***** UPDATE ***** I added an if around the close like this:
if (!$zip->close()) {
echo "failed writing zip to archive";
}
The message gets echoed out, so obviously the problem is there. I've also checked to make sure the $zip->open() works, and I've confirmed that it is opening it without a problem.
回答1:
Finally managed to get something working using addFile.
I created a helper class that contains 3 functions: one to list all the files in a directory, 1 to zip all those files, and 1 to download the zipped files:
<?php
require_once($_SERVER["DOCUMENT_ROOT"]."/config.php");
class FileHelper extends ZipArchive
{
/**
* Lists files in dir
*
* This function expects an absolute path to a folder intended as the target.
* The function will attempt to create an array containing the full paths to
* all files in the target directory, except for . and ..
*
* @param dir [string] : absolute path to the target directory
*
* @return result [array] : array of absolute paths pointing to files in the target directory
*/
public static function listDirectory($dir)
{
$result = array();
$root = scandir($dir);
foreach($root as $value) {
if($value === '.' || $value === '..') {
continue;
}
if(is_file("$dir$value")) {
$result[] = "$dir$value";
continue;
}
if(is_dir("$dir$value")) {
$result[] = "$dir$value/";
}
foreach(self::listDirectory("$dir$value/") as $value)
{
$result[] = $value;
}
}
return $result;
}
/**
* Zips and downloads files
*
* This function expects a directory location as target for a temp file, and a list(array)
* of absolute file names that will be compressed and added to a zip file. After compression,
* the temporary zipped file will be downloaded and deleted.
*
* @param location [string] : absolute path to the directory that will contain the temp file
* @param file_list [array] : array of absolute paths pointing to files that need to be compressed
*
* @return void
*/
public function downloadZip($file)
{
$modules = apache_get_modules();
if (in_array('mod_xsendfile', $modules)) // Note, it is not possible to detect if X-SendFile is turned on or not, we can only check if the module is installed. If X-SendFile is installed but turned off, file downloads will not work
{
header("Content-Type: application/octet-stream");
header('Content-Disposition: attachment; filename="'.basename($file).'"');
header("X-Sendfile: ".realpath(dirname(__FILE__)).$file);
// Apache will take care of the rest, so terminate the script
exit;
}
header("Content-Type: application/octet-stream");
header("Content-Length: " .(string)(filesize($file)) );
header('Content-Disposition: attachment; filename="'.basename($file).'"');
header("Content-Transfer-Encoding: binary");
header("Expires: 0");
header("Cache-Control: no-cache, must-revalidate");
header("Cache-Control: private");
header("Pragma: public");
ob_end_clean(); // Without this, the file will be read into the output buffer which destroys memory on large files
readfile($file);
}
/**
* Zips files
*
* This function expects a directory location as target for a temp file, and a list(array)
* of absolute file names that will be compressed and added to a zip file.
*
* @param location [string] : absolute path to the directory that will contain the temp file
* @param file_list [array] : array of absolute paths pointing to files that need to be compressed
*
* @return zip_file [string] : absolute file path of the freshly zipped file
*/
public function zipFile($location, $file_list)
{
$tmp_file = tempnam($location,'');
$zip_file = preg_replace('"\.tmp$"', '.zip', $tmp_file);
$zip = new ZipArchive();
if ($zip->open($zip_file, ZIPARCHIVE::CREATE) === true)
{
foreach ($file_list as $file)
{
if ($file !== $zip_file)
{
$zip->addFile($file, substr($file, strlen($location)));
}
}
$zip->close();
}
// delete the temporary files
unlink($tmp_file);
return $zip_file;
}
}
?>
Here's how I called this class's functions:
$location = "d:/some/path/to/file/";
$file_list = $file_helper::listDirectory($location);
$zip_file = $file_helper->zipFile($location, $file_list);
$file_helper->downloadZip($zip_file);
回答2:
Check out this solution, much clearer:
function Zip($source, $destination)
{
if (!extension_loaded('zip') || !file_exists($source)) {
return false;
}
$zip = new ZipArchive();
if (!$zip->open($destination, ZIPARCHIVE::CREATE)) {
return false;
}
$source = str_replace('\\', '/', realpath($source));
if (is_dir($source) === true)
{
$files = new RecursiveIteratorIterator(new RecursiveDirectoryIterator($source), RecursiveIteratorIterator::SELF_FIRST);
foreach ($files as $file)
{
$file = str_replace('\\', '/', $file);
// Ignore "." and ".." folders
if( in_array(substr($file, strrpos($file, '/')+1), array('.', '..')) )
continue;
$file = realpath($file);
if (is_dir($file) === true)
{
$zip->addEmptyDir(str_replace($source . '/', '', $file . '/'));
}
else if (is_file($file) === true)
{
$zip->addFile($file, str_replace($source . '/', '', $file));
}
}
}
else if (is_file($source) === true)
{
$zip->addFile($file, str_replace($source . '/', '', $file));
}
return $zip->close();
}
And use it like:
Zip('/folder/to/compress/', './compressed.zip');
Check the original post with addFromString
来源：https://stackoverflow.com/questions/29102612/zipping-the-contents-of-a-folders-in-php