MySQL Inserts record with NULL value in NOT NULL column

Question

Why does the first INSERT go through for table2. Note that table2.col_1 is NOT NULL. It doesn\'t insert NULL for col_1, but mysteriously converts the NULL value to an empty

Answer 1

You have MySQL's STRICT mode OFF. Turn it on and you'll get an error.

Otherwise you can test for those warnings with PDO via: http://php.net/manual/en/pdo.errorinfo.php