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Form Validation

When you start using forms to interact with a database, it becomes very important to validate the information your forms are sending. This is especially true when using web forms to insert new records into a database or to edit existing database information. Form validation is the process of making sure that the information contained in the form is of the proper type. For example, if there are required fields on the form, have they been filled in? If a particular field is supposed to contain numbers only, does it actually contain the correct data type?

Without form validation, it is possible for users to send incorrectly formatted information to your database. This could cause your queries to break or, worse yet, to corrupt the information in your database.


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