PHP Manual: ZipArchive::open

Description

public function ZipArchive::open(string $filename, int $flags = 0): bool|int

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

Since libzip 1.6.0, an empty file is not a valid archive any longer.

Note:
When creating a new archive with ZipArchive::CREATE, the file is not actually written to disk until ZipArchive::close() is called. Therefore, errors related to the file system (such as permission denied or a non-existent parent directory) will only be reported when calling ZipArchive::close(), not when calling this method.

Parameters

filename

The file name of the ZIP archive to open.

flags

The mode to use to open the archive.

Return Values

Returns true on success, false or one of the following error codes on error:

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.

Examples

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';
}
?>

Example #3 Create an temporary archive

<?php
$name = tempnam(sys_get_temp_dir(), "FOO");
$zip = new ZipArchive;
$res = $zip->open($name, ZipArchive::OVERWRITE); /* truncate as empty file is not valid */
if ($res === TRUE) {
    $zip->addFile('data.txt', 'entryname.txt');
    $zip->close();
    echo 'ok';
} else {
    echo 'failed';
}
?>