Fatal error: Class 'ZipArchive' not found in

I have a problem when I install 'Archive_Zip 0.1.1' on the Linux server, but when I try to run the script to create the zip file it gives the fatal error

Fatal error: Class ZipArchive not found in ...

where I put the code

$zip = new ZipArchive;
var_dump($zip);
$res = $zip->open($filename, ZipArchive::OVERWRITE);
if ($res !== TRUE) {
    echo 'Error: Unable to create zip file';
    exit;
}
if (is_file($src)) {
    $zip->addFile($src);
} else {
    // echo "<br>" . dirname(__FILE__) . $src;//'/install1';
    if (!is_dir($src)) {
         $zip->close();
         @unlink($filename);
         echo 'Error: File not found';
         exit;
    }
    recurse_zip($src, $zip, $path_length);
}
$zip->close();
echo "<br>file name ".$filename;

but it doesn't find the class file.

Please tell me the solution. What should I do to resolve the problem? I also put the php.ini file in the folder where the script is, but it does not work.

For the ZipArchive class to be present, PHP needs to have the zip extension installed.

See this page for installation instructions (both Linux and Windows).

On Debian and Ubuntu, you can usually install it with:

sudo apt update
sudo apt install php-zip

Then restart your webserver. Example:

sudo systemctl restart apache2