How to Recursively Zip a Directory in PHP?

How to [Recursively] Zip a Directory in PHP

The goal is to effectively zip a directory, including all its subdirectories and files, in PHP.

Approach Using PHP Zip Class

You can utilize the PHP Zip class to achieve this. The provided code offers a basic approach, but it only operates with individual files, not directories.

Working Code

To tackle this challenge, consider the following code:

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)
            {
                $zip->addFromString(str_replace($source . '/', '', $file), file_get_contents($file));
            }
        }
    }
    else if (is_file($source) === true)
    {
        $zip->addFromString(basename($source), file_get_contents($source));
    }

    return $zip->close();
}

Usage:

Invoke the Zip function as shown here:

Zip('/folder/to/compress/', './compressed.zip');

This code recursively iterates through the specified source directory and its subdirectories, adding files and empty directories to the zip archive. Its operation is compatible with both Windows and Linux platforms.

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