Re SQL Injection Attack using MySQL, what are baseline requirements?

This code is as leaky as a sieve. You are calling mysql_query in one function with no mysql_real_escape_string() in sight. You are using PDO in another function.

This is a mess and makes no sense. If you know how to use PDO, just use that. Then you will be safe.

Have asked this question entirely wrong. Have reposted the question here.

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