What are the potential pitfalls of passing variables through a URL in PHP?

Passing variables through a URL in PHP can expose sensitive information and make your application vulnerable to security risks such as SQL injection attacks. To solve this issue, you should sanitize and validate any user input before using it in your application. 

// Example of sanitizing and validating user input from URL parameters
$id = isset($_GET['id']) ? intval($_GET['id']) : 0;
$name = isset($_GET['name']) ? htmlspecialchars($_GET['name']) : '';

Keywords

security vulnerability injection validation encryption

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