{keyword} Union All Select Null,null,null-- Djgp -

If you expect a zip code, don't accept a string that starts with UNION .

Instead of building strings, use prepared statements. This treats input as "data" rather than "executable code." {KEYWORD} UNION ALL SELECT NULL,NULL,NULL-- DJGP

You don’t have to be a security wizard to stop this. The "Golden Rule" of modern web dev is simple: If you expect a zip code, don't accept

: They use "NULL" to figure out exactly how many columns your database table has without triggering a data-type error. The "Golden Rule" of modern web dev is

Seeing {KEYWORD} UNION ALL SELECT in your logs is a reminder that the internet is always "knocking on the door." By using modern coding practices, you make sure that door stays locked.

: The attacker is trying to append their own results to your original database query.

It looks like you've provided a common SQL injection payload ( UNION ALL SELECT NULL... ) followed by the initials "DJGP."