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Validating data from database php

If data being inserted or updated violates a check constraint the database engine will not allow the INSERT or UPDATE operation to occur.

A check constraint is a rule that identifies acceptable column values for data in a row within a SQL Server table. Domain integrity defines the valid values for columns within a database table.

So, I actually put the page_ID as ‘ OR 1’ as we talked about earlier and you forgot to sanitize the page_ID.

T(I know you wouldn’t really forget to do that J) Since we used our mysql_real_escape_string() function, we prevented the injection.

It’s when the bad guys inject data into your site, which will later be sent to the client-side, to maliciously get data from users, modify your site in a way to change data, or delete data.

Cross-Site injection is huge security vulnerability. So, how can you help to prevent this from happening?

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Over the last two posts, you’ve learned how to protect your PHP site using validation, sanitization, My SQL injection prevention, and some Cross-Site injection skills. There’s lots of information online to help protect your site, and the more you know, the safer you are.

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