$re = '/\/\*\*[\s\S]*?\*\//s';
$str = '
class CategoryController extends Controller
{
/**
* Display a listing of the resource.
*
* @return \\Illuminate\\Http\\Response
*/
public function index()
{
//
}
/**
* Show the form for creating a new resource.
*
* @return \\Illuminate\\Http\\Response
*/
public function create()';
$subst = "";
$result = preg_replace($re, $subst, $str);
echo "The result of the substitution is ".$result;
Please keep in mind that these code samples are automatically generated and are not guaranteed to work. If you find any syntax errors, feel free to submit a bug report. For a full regex reference for PHP, please visit: http://php.net/manual/en/ref.pcre.php