What are some common pitfalls when creating a PHP code generator that changes based on user input?

One common pitfall when creating a PHP code generator that changes based on user input is not properly sanitizing and validating the user input. This can lead to security vulnerabilities such as SQL injection or cross-site scripting attacks. To mitigate this risk, always sanitize and validate user input before using it to generate code. 

// Sanitize and validate user input before using it in the code generator
$user_input = $_POST['user_input'];

// Example of sanitizing user input using htmlspecialchars
$sanitized_input = htmlspecialchars($user_input);

// Example of validating user input as an integer
if (is_numeric($user_input)) {
    // Generate code based on sanitized and validated user input
    $generated_code = "echo 'User input: $sanitized_input';";
} else {
    // Handle invalid user input
    $generated_code = "echo 'Invalid input';";
}

echo $generated_code;

Keywords

input validation dynamic code generation security vulnerabilities code injection user-controlled code

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