What are the potential pitfalls of using PHP superglobal variables and how can they be avoided?

Using PHP superglobal variables like $_GET, $_POST, and $_REQUEST directly in your code can lead to security vulnerabilities such as injection attacks or data manipulation. To avoid these pitfalls, it is recommended to sanitize and validate user input before using it in your application. 

// Example of sanitizing user input from $_GET superglobal
$user_input = isset($_GET['input']) ? htmlspecialchars($_GET['input']) : '';

Keywords

superglobal variables security vulnerabilities data injection input validation cross-site scripting

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