在PHP中压缩文件时删除目录结构

<?php
function zipFilesAndRemoveDirStructure($source, $destination) {
    $zip = new ZipArchive();
    if (!$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('\\', '/', $file);
            if (in_array($file, [$source . '/', $destination])) {
                continue;
            }
            $file = substr($file, strlen($source) + 1);
            if ($file[0] == '/') {
                $file = substr($file, 1);
            }
            if (is_dir($source . '/' . $file) === true) {
                $zip->addEmptyDir($file);
            } else if (is_file($source . '/' . $file) === true) {
                $zip->addFromString($file, file_get_contents($source . '/' . $file));
            }
        }
    } else if (is_file($source) === true) {
        $zip->addFromString(basename($source), file_get_contents($source));
    }
    return $zip->close();
}

$source = 'path/to/source';
$destination = 'path/to/destination.zip';
if (zipFilesAndRemoveDirStructure($source, $destination)) {
    echo 'Zip created successfully';
} else {
    echo 'Failed to create zip';
}
?>