$array = [];
$dir = realpath('.');
$fileSPLObjects = new RecursiveIteratorIterator(new RecursiveDirectoryIterator($dir), RecursiveIteratorIterator::CHILD_FIRST);
foreach($fileSPLObjects as $fullFileName => $fileSPLObject ) {
if ($fileSPLObject->isFile()) {
$info = new SplFileInfo($fullFileName);
if ($info->getExtension() === 'zip') {
$array[] = $fullFileName;
}
}
}
echo '<pre>';
print_r($array);