How to use to_tsquery (postgres) with PDO?

Question

PHP

Hello!
Writing:

$STM = $PDO->prepare('SELECT title FROM zz_ad.advs WHERE (to_tsvector(\'russian\',title) @@ to_tsquery(\'russian\', :str))');
$STM->execute(['str' => 'Привет!']);
$STM->fetchAll();

And I get an error

Syntax error: 7 ERROR: syntax error in tsquery: "Hi!"

If you write without an exclamation mark just "Hello" then there is no error. Which is very suspicious, like it's not even trying to escape anything.
What could be the problem?
Thank you!

Answer 1

or
SELECT title
FROM table
WHERE title_tsv @@ to_tsquery('zend') and
title_tsv @@ to_tsquery('fram:*')

Answer 2

can @@ be replaced by \@\@?