How do you write a custom PHP script to handle form validation strictly?

Question

I am bypassing heavy frameworks for a small project and need to validate user text inputs before processing. What native PHP functions strip dangerous tags?

SecOpsExpert · Answer

Always use trim() to remove whitespace, stripslashes() to clear escaped quotes, and htmlspecialchars() to convert special characters into HTML entities. This ensures malicious script tags are rendered harmless before saving to your database.

How do you write a custom PHP script to handle form validation strictly?

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