Input validation can be used to detect unauthorized input before it is processed by the application.Why should you bother setting up framework for a simple web form?start date is before end date, price is within expected range).
Input validation should happen as early as possible in the data flow, preferably as soon as the data is received from the external party.
Data from all potentially untrusted sources should be subject to input validation, including not only Internet-facing web clients but also backend feeds over extranets, from suppliers, partners, vendors or regulators, each of which may be compromised on their own and start sending malformed data.
(like e-mail validation to make sure it's in an email format) There are a lot of ways to do it, but which ones you would suggest?
I don't want to be writing 50 lines of code when i could do the job in 10 lines..that makes sense :p Any help would be appreciated, thanks!
But if users can post their own content, then you need to keep them from adding arbitrary script tags to the pages.
Input validation is performed to ensure only properly formed data is entering the workflow in an information system, preventing malformed data from persisting in the database and triggering malfunction of various downstream components.
These validation methods include client-side, server-side, and custom validation; CAPTCHA images; and Spry validation fields.
You'll also see how to set up a PHP testing environment and preview PHP pages in Dreamweaver.
Syntactic validation should enforce correct syntax of structured fields (e.g.
SSN, date, currency symbol) while semantic validation should enforce correctness of their values in the specific business context (e.g.
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