CODEWITHSUNDEEP
phppdo
CConard96
CConard96

Reputation: 914

PHP PDO protect database name

I understand that you cannot use database or table names as parameters in prepared statements. However, our app allows a user to specify the database name during the install. Is there an abstract or PDO provided way to quote these names (backticks for MySQL, brackets for MSSql, etc)?

Upvotes: 1

Views: 241

Answers (1)

vuryss
vuryss

Reputation: 1300

You cannot directly escape column names and table names in PDO. You can see the answer here:

escaping column name with PDO

What you can do in this situation is to make a query to get all the tables from the given database, like this:

SHOW TABLES;

Or query to get all Databases like this one:

SHOW DATABASES;

Then use this as a white-list for the user input. When you're using databases, it's wise to exclude some system databases like mysql itself and information_schema.

Other option is to filter the user input with a given regex, for example if your table/database names are only strings with underscore you can use:

preg_match('/^[a-z_]+$/i', $userGivenTableName)

This should remove any potential strings containing SQL Injections.

Upvotes: 1

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