What are security considerations for functions?

Security, Functions, Javascript, Coding Best Practices, Data Validation, Input Sanitization
This document discusses security considerations for functions in JavaScript, including practices like input validation and output encoding to prevent vulnerabilities such as XSS and injection attacks.
<?php // Example of validating user input in a function function sanitizeInput($data) { // Trim white spaces $data = trim($data); // Remove slashes $data = stripslashes($data); // Convert special characters to HTML entities $data = htmlspecialchars($data); return $data; } // Usage $userInput = "Hello "; $sanitizedInput = sanitizeInput($userInput); echo $sanitizedInput; // Outputs: Hello <script>alert('XSS');</script> ?>

Security Functions Javascript Coding Best Practices Data Validation Input Sanitization

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