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How to Securely Sanitize User Input in PHP – Best Practices for Web Security body {font-family: Arial, sans-serif; line-height: 1.6; margin:0; padding:20px; max-width:800px;} h1, h2, h3 {color:#2c3e50;} code {background:#f4f4f4; padding:2px 4px; border-radius:3px;} pre {background:#f4f4f4; padding:10px; overflow:auto;} How to Securely Sanitize User Input in PHP When building PHP applications, user input sanitization is the first line of defense against a wide range of security threats, including Cross‑Site Scripting (XSS), SQL injection, and remote code execution.
This guide walks you through the most reliable, SEO‑friendly methods to clean, validate, and escape data before it reaches your business logic or database. Why Sanitization.
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