mysql - Can trim() and strip_tags() prevent sql injection in php?

Is using trim() and strip_tags() for preventing sql injection is as okay as PDO or Prepaid Statement?
thre is another question on how to prevent sql injection. trim() and strip_tags() was not even discussed there.

I dont know from where people saying duplicate finding about trim() and strip_tags() in the former question answer!? Go read the answers and my question again

     $username = strip_tags(trim($_POST["username"]));
     $password = strip_tags(trim($_POST["password"]));