php 解压 .gz 文件

try {
$phar = new PharData($save_url, Phar::CURRENT_AS_FILEINFO | Phar::KEY_AS_FILENAME);
$phar->extractTo($path, null, true);
} catch (UnexpectedValueException $e) {
die('Could not open');
} catch (BadMethodCallException $e) {
echo 'technically, this cannot happen';
}

$zip = new ZipArchive();
$zip_open = $zip->open($save_url);
var_dump($zip_open);
if(true===$zip_open){
$zip->extractTo('./Zip/');
$zip->close();
}

$buffer_size = 4096;
$out_file_name = str_replace('.gz', '', $save_url);
$file = gzopen($save_url, 'rb');
$out_file = fopen($out_file_name, 'wb');
while(!gzeof($file)) {
fwrite($out_file, gzread($file, $buffer_size));
}
fclose($out_file);
gzclose($file);