$re = '/^(?!insert|delete|update|procedure) {0,}select.*?;$/ims';
$str = 'select 1 from dual;
delete from table where id =
(
select 1 from dual
);
update table set id = 1 where id in (
select 1 from dual);
procedure dsdsd select fdsfds;
PROCEDURE myproc ()
IS
BEGIN
SELECT
1 from dual;
END AlterarDireito;
';
preg_match_all($re, $str, $matches, PREG_SET_ORDER, 0);
// Print the entire match result
var_dump($matches);
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