How can PHP users avoid potential risks when implementing scripts without a solid understanding of PHP and HTML?

Potential risks can be avoided by using PHP functions that sanitize and validate user input to prevent SQL injection, cross-site scripting (XSS), and other security vulnerabilities. Additionally, escaping output using htmlspecialchars() can help prevent malicious code from being executed in HTML. 

// Example of sanitizing user input to prevent SQL injection
$user_input = $_POST['user_input'];
$clean_input = mysqli_real_escape_string($connection, $user_input);

// Example of escaping output to prevent XSS
echo htmlspecialchars($unsafe_output, ENT_QUOTES, 'UTF-8');

Keywords

security vulnerabilities input validation cross-site scripting SQL injection error handling

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