Web Security: Common Vulnerabilities And Their Mitigation - Sanitizing input - still not done

The video tutorial discusses preventing cross-site scripting in PHP by using the HTML special chars function to convert special characters into HTML entities, making them safe to render in browsers. It emphasizes the importance of sanitizing user input before storing it in databases and introduces a 'clean' function to perform basic sanitization. The tutorial also covers various PHP functions like trim, strip slashes, and strip_tags to sanitize input effectively.

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