ZipArchive::open

(PHP 5 >= 5.2.0, PHP 7, PECL zip >= 1.1.0)

ZipArchive::open — Open a ZIP file archive

说明

ZipArchive::open ( string $filename [, int $flags ] ) : mixed

Opens a new zip archive for reading, writing or modifying.

参数

filename

The file name of the ZIP archive to open.

flags

The mode to use to open the archive.

返回值

Error codes

Returns TRUE on success or the error code.

  • ZipArchive::ER_EXISTS

    File already exists.

  • ZipArchive::ER_INCONS

    Zip archive inconsistent.

  • ZipArchive::ER_INVAL

    Invalid argument.

  • ZipArchive::ER_MEMORY

    Malloc failure.

  • ZipArchive::ER_NOENT

    No such file.

  • ZipArchive::ER_NOZIP

    Not a zip archive.

  • ZipArchive::ER_OPEN

    Can't open file.

  • ZipArchive::ER_READ

    Read error.

  • ZipArchive::ER_SEEK

    Seek error.

范例

Example #1 Open and extract

<?php
$zip = new ZipArchive;
$res = $zip->open('test.zip');
if ($res === TRUE) {
    echo 'ok';
    $zip->extractTo('test');
    $zip->close();
} else {
    echo 'failed, code:' . $res;
}
?>

Example #2 Create an archive

<?php
$zip = new ZipArchive;
$res = $zip->open('test.zip', ZipArchive::CREATE);
if ($res === TRUE) {
    $zip->addFromString('test.txt', 'file content goes here');
    $zip->addFile('data.txt', 'entryname.txt');
    $zip->close();
    echo 'ok';
} else {
    echo 'failed';
}
?>

User Contributed Notes

ohcc at 163 dot com 14-Dec-2015 10:29
ZipArchive::OVERWRITE does NOT mean an existing file would be deleted when ZipArchive::open() is called.

In fact, the existing file will be deleted before PHP saves the zip archive on disk.

PHP takes these steps to finish zipping:

1. When ZipArchive::open('xx.zip') is called
If 'xx.zip' exists and is a zip archive, it will be opened and read as a temporary zip file,
If the file does not exist, and ZipArchive::CREATE is applied, php will create a temporary empty zip file
In these cases, ZipArchive::open() returns true, otherwise it returns an integer error code.
2. Adds file(s) to the temporary zip file when methods such as addFile(), addFromString() are called.
3. Deletes the existing file before saving the temporary zip file on disk.
4. Save the temporary zip file on disk
5.  Closes the active archive when ZipArchive::close() is called or at the end of the script

Since PHP does NOT delete the existing file before saving the zip archive on disk, you should use unset() to delete it if you want to zip that file's containing folder and save the zip archive in that folder, otherwise you will get a larger and larger zip archive everytime you refresh the page.
ohcc at 163 dot com 06-Nov-2015 09:45
return values of ZipArchive::open() and their values and meanings
ZipArchive::ER_SEEK     4    Seek error.
ZipArchive::ER_READ     5    Read error.
ZipArchive::ER_NOENT     9    No such file.
ZipArchive::ER_OPEN     11    Can't open file.
ZipArchive::ER_EXISTS     10    File already exists.
ZipArchive::ER_MEMORY 14    Malloc failure.
ZipArchive::ER_INVAL     18    Invalid argument.
ZipArchive::ER_NOZIP     19    Not a zip archive.
ZipArchive::ER_INCONS     21    Zip archive inconsistent
ohcc at 163 dot com 06-Nov-2015 09:29
<?php
    // Use ZipArchive::OVERWRITE when the targetd file does not exist may lead you to an error like this
    // Warning: ZipArchive::addFile(): Invalid or uninitialized Zip object
    // try ZipArchive::OVERWRITE|ZipArchive::CREATE when you want to replace a zip archive that may not exist
    $zip = new ZipArchive;
    $rt=$zip->open('i.zip',ZipArchive::OVERWRITE);
    echo $rt;
    // when i.zip does not exist, $rt is 9, ZipArchive::ER_NOENT, or "No such file."
    $zip->addFile('wuxiancheng.cn.sql','db.sql');
    // triggers an error with the message "Warning: ZipArchive::addFile(): Invalid or uninitialized Zip object ..."
   
   
    // Use ZipArchive::OVERWRITE|ZipArchive::CREATE
    $zip = new ZipArchive;
    $zip->open('i.zip',ZipArchive::OVERWRITE|ZipArchive::CREATE);   
    $zip->addFile('wuxiancheng.cn.sql','db.sql');   
?>
abolfazl dot ziaratban at gmail dot com 24-May-2015 04:35
<?php
#made by abolfazl ziaratban (c)
#license GPL

class zip extends ZipArchive
    {
        public function message($code)
            {
                switch ($code)
                    {
                        case 0:
                        return 'No error';
                       
                        case 1:
                        return 'Multi-disk zip archives not supported';
                       
                        case 2:
                        return 'Renaming temporary file failed';
                       
                        case 3:
                        return 'Closing zip archive failed';
                       
                        case 4:
                        return 'Seek error';
                       
                        case 5:
                        return 'Read error';
                       
                        case 6:
                        return 'Write error';
                       
                        case 7:
                        return 'CRC error';
                       
                        case 8:
                        return 'Containing zip archive was closed';
                       
                        case 9:
                        return 'No such file';
                       
                        case 10:
                        return 'File already exists';
                       
                        case 11:
                        return 'Can\'t open file';
                       
                        case 12:
                        return 'Failure to create temporary file';
                       
                        case 13:
                        return 'Zlib error';
                       
                        case 14:
                        return 'Malloc failure';
                       
                        case 15:
                        return 'Entry has been changed';
                       
                        case 16:
                        return 'Compression method not supported';
                       
                        case 17:
                        return 'Premature EOF';
                       
                        case 18:
                        return 'Invalid argument';
                       
                        case 19:
                        return 'Not a zip archive';
                       
                        case 20:
                        return 'Internal error';
                       
                        case 21:
                        return 'Zip archive inconsistent';
                       
                        case 22:
                        return 'Can\'t remove file';
                       
                        case 23:
                        return 'Entry has been deleted';
                       
                        default:
                        return 'An unknown error has occurred('.intval($code).')';
                    }               
            }

        public function isDir($path)
            {
                return substr($path,-1) == '/';
            }

        public function getTree()
            {
                $Tree = array();
                $pathArray = array();
                for($i=0; $i<$this->numFiles; $i++)
                    {
                        $path = $this->getNameIndex($i);
                        $pathBySlash = array_values(explode('/',$path));
                        $c = count($pathBySlash);
                        $temp = &$Tree;
                        for($j=0; $j<$c-1; $j++)
                            if(isset($temp[$pathBySlash[$j]]))
                                $temp = &$temp[$pathBySlash[$j]];
                            else
                                {
                                    $temp[$pathBySlash[$j]] = array();
                                    $temp = &$temp[$pathBySlash[$j]];
                                }
                        if($this->isDir($path))
                            $temp[$pathBySlash[$c-1]] = array();
                        else
                            $temp[] = $pathBySlash[$c-1];
                    }
                return $Tree;
            }
    }
?>
jekillen at prodigy net 13-Apr-2015 07:23
Calling ZipArchive->open() will not create an empty zip archive file.
I found this out the hard way. I wrote code that produced positive
results: I.E. the return value from the call to ZipArchive was TRUE
and the empty zip file was not created. So at least call
ZipArchive->addFromString(<filename.zip>, '<minimal content>')
when creating a new zip archive file.
Eric Langlois 29-Jan-2014 09:53
<?PHP
        $zip = new ZipArchive;
    $res = $zip->open('test.zip', ZipArchive::CREATE);

    if ( $res === TRUE) {
               //CODE GOES HERE
       
        $zip->close();
    } else {
        switch($res){
            case ZipArchive::ER_EXISTS:
                $ErrMsg = "File already exists.";
                break;

            case ZipArchive::ER_INCONS:
                $ErrMsg = "Zip archive inconsistent.";
                break;
               
            case ZipArchive::ER_MEMORY:
                $ErrMsg = "Malloc failure.";
                break;
               
            case ZipArchive::ER_NOENT:
                $ErrMsg = "No such file.";
                break;
               
            case ZipArchive::ER_NOZIP:
                $ErrMsg = "Not a zip archive.";
                break;
               
            case ZipArchive::ER_OPEN:
                $ErrMsg = "Can't open file.";
                break;
               
            case ZipArchive::ER_READ:
                $ErrMsg = "Read error.";
                break;
               
            case ZipArchive::ER_SEEK:
                $ErrMsg = "Seek error.";
                break;
           
            default:
                $ErrMsg = "Unknow (Code $rOpen)";
                break;
               
           
        }
         die( 'ZipArchive Error: ' . $ErrMsg);
    }
?>
walter at clevertechie dot com 17-Nov-2012 08:53
If you have archives that you want to overwrite just use:

ZIPARCHIVE::CREATE

It will overwrite existing archives and at the same time create new ones if they don't already exist.

ZIPARCHIVE::OVERWRITE won't work for both of these scenarios.

(PHP version 5.4.4)
YiiWanAB at hotmail dot com 30-Aug-2011 10:06
Most of the time people iterate over a directory with 'opendir' or 'readdir' to add files to a zip. Like...

while ($file = readdir($dir)) { ... $zip->addFile($file) }

Note that $zip->addFile($file) will only work in the current directory if your at the root. You will need to add the correct path to that $file string variable to have the full file name like ...

$zip->addFile($dir . DIRECTORY_SEPARATOR . $file); will work.

This may identify why you may get a read error when closing the file.

Enjoy.
sunil dt bhave at gmail dt com 16-Mar-2011 10:44
Even though the api specifies that the flags are optional I found that I had to specify the flag ZIPARCHIVE::CREATE for an archive to be opened.
This is on a Windows 7 system with PHP 5.3.0
Jan Vavra 10-Mar-2011 12:04
As discussed in http://bugs.php.net/bug.php?id=54128 on Windows Server systems (2003, 2008) and IIS there is a problem when you want to unzip file stored in C:\Windows\Temp folder.
User of worker process IUSR_XXX has no directory listing right for C:\Windows\Temp and this is a reason why ZipArchive::open() fails with error 11 (error open). So it is not a good idea to store file for unzipping in folder defined by sys_get_temp_dir().
sebwoolford at gmail dot com 23-Oct-2009 03:29
Further to what rickky at gmail dot com was saying, I've had that problem while trying to cache zip files and found that I had to set the permissions of the containing folder to 777 to get it to work.

Because this is a potential security weakness if on a public viewable folder, I'd recommend moving the folder so that it is no longer within public_html. You can then use readfile() to output the archive to the browser, with some HTTP headers to tell the browser it is a zip file.
michael202 at gmx dot de 29-Jul-2009 06:33
to anyone getting an error ZIPARCHIVE::ER_READ = 5, when
doing $zip->open($zipfile) with a ZIP file containing a total of more then (around) 800 files (even when they are in sub-directories).

possibly related bugs 40873, 8714:

1. it was not an OS limit, because it worked when called from windows via samba on the same file at the same place

2. it wasn't working under 32bit linux

with php 5.3.0 the issue seems to be resolved.
eric at webdeveric dot com 06-Feb-2009 07:06
With php 5.2.6, the following code created a new zip or replaced a existing zip.
Note that I am only using the ZIPARCHIVE::OVERWRITE flag.

<?php
    $zip = new ZipArchive();
    $opened = $zip->open( $zipFileName, ZIPARCHIVE::OVERWRITE );
    if( $opened !== true ){
        die("cannot open {$zipFileName} for writing.");
    }
    $zip->addFromString( $name, $contents );
    $zip->close();
?>

Now, with php 5.2.8, it does not work and gives this warning:

Warning: ZipArchive::addFromString() [ziparchive.addfromstring]: Invalid or unitialized Zip object in [myfile] on line [myline]

To fix this, you must specify the flags as create or overwrite.

<?php
    $zip = new ZipArchive();
    $opened = $zip->open( $zipFileName, ZIPARCHIVE::CREATE | ZIPARCHIVE::OVERWRITE );
    if( $opened !== true ){
        die("cannot open {$zipFileName} for writing.");
    }
    $zip->addFromString( $name, $contents );
    $zip->close();
?>

When googling for the error message I found a lot of people that had it but couldn't figure out why they were getting it.
I hope this helps someone.
jj at icglink dot com 04-Dec-2008 11:09
if you are echoing out the output and confused about the number...maybe this will help.  i'm not totally sure it is accurate though.

ZIPARCHIVE::ER_EXISTS - 10
ZIPARCHIVE::ER_INCONS - 21
ZIPARCHIVE::ER_INVAL - 18
ZIPARCHIVE::ER_MEMORY - 14
ZIPARCHIVE::ER_NOENT - 9
ZIPARCHIVE::ER_NOZIP - 19
ZIPARCHIVE::ER_OPEN - 11
ZIPARCHIVE::ER_READ - 5
ZIPARCHIVE::ER_SEEK - 4
azsymvelik at gmail dot com 01-Aug-2008 01:25
<?php

/*
Hi!

I made a little script about checking content and "secure repacking"
*/

$somefile = "zip.zip";
$someurl = "/some/url"
$zip = new ZipArchive;
$open = $zip->open($somefile, ZIPARCHIVE::CHECKCONS);
// If the archive is broken(or just another file renamed to *.zip) the function will return error on httpd under windows, so it's good to check if the archive is ok with ZIPARCHIVE::CHECKCONS
if ($open === TRUE) {
if(!$zip->extractTo($someurl)) {
die ("Error during extracting");
}
$zip->close();
}
$new_archive_name = "new.zip";
$new_zip = new ZipArchive;
$new_open = $new_zip->open($new_archive_name, ZIPARCHIVE::CREATE);
if ($new_open === TRUE) {
$dir = opendir($someurl);
while ($file = readdir($dir)) {
 if ($file == "." || $file == "..") { } else {
 //We do not wanna this files in the new zip archive
  if (!$new_zip->addFile($file)) {
     print $file."was not added!<br />";
   }
  }
 }
}
$new_zip->close();
?>
Jonathan Baltazar 23-Jul-2008 07:14
The file name does not need to end in '.zip' if it is created using tempnam().  You just need to overwrite the file instead of trying to read it:

<?php
$file = tempnam("tmp", "zip");
   
$zip = new ZipArchive();

// Zip will open and overwrite the file, rather than try to read it.
$zip->open($file, ZipArchive::OVERWRITE);

$zip->close();

// Stream the file to the client
header("Content-Type: application/zip");
header("Content-Length: " . filesize($file));
header("Content-Disposition: attachment; filename=\"a_zip_file.zip\"");
readfile($file);

unlink($file);
?>
olivier pons 16-May-2008 12:26
If you try this to open a file with creation in mind (= empty zip to fill with other files), this may not work :

$res = $zip->open($zip_file, ZipArchive::CREATE);

// you may get false

Try this instead, it should work :

$res = $zip->open($zip_file, ZIPARCHIVE::OVERWRITE);
rickky at gmail dot com 02-Jul-2007 05:07
If the directory you are writing or saving into does not have the correct permissions set, you won't get any error messages and it will look like everything worked fine... except it won't have changed!

Instead make sure you collect the return value of ZipArchive::close(). If it is false... it didn't work.