Filtering $_POST data
The process of filtering data can encompass any or all of the following:
- Removing unwanted characters (that is, removing
<script>tags) - Performing transformations on the data (that is, converting a quote to
") - Encrypting or decrypting the data
Encryption is covered in the last recipe of this chapter. Otherwise, we will present a basic mechanism that can be used to filter $_POST data arriving following form submission.
How to do it...
- First of all, you need to have an awareness of the data that will be present in
$_POST. Also, perhaps more importantly, you will need to be aware of the restrictions imposed by the database table in which the form data will presumably be stored. As an example, have a look at the database structure ...
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