Web Security: Common Vulnerabilities And Their Mitigation - Validating input - some more stuff to say

The video tutorial explains the process of form validation using PHP and HTML. It covers how forms are initially displayed, how input is processed and validated, and how error messages are handled. The tutorial emphasizes the importance of preserving user input to avoid re-entering data after errors. It also details how to manage radio button states using PHP scripting to ensure the correct options are selected based on previous submissions.

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