What are the potential risks of not properly validating user inputs in PHP?

Not properly validating user inputs in PHP can lead to security vulnerabilities such as SQL injection, cross-site scripting (XSS), and other forms of attacks. To mitigate these risks, always validate and sanitize user inputs before using them in your application. 

// Example of validating and sanitizing user input in PHP
$user_input = $_POST['user_input'];

// Validate and sanitize user input
$validated_input = filter_var($user_input, FILTER_SANITIZE_STRING);

// Use the validated input in your application
echo "User input: " . $validated_input;

Keywords

SQL injection cross-site scripting data validation security vulnerability input sanitization

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