What are common pitfalls to avoid when creating PHP evaluation scripts for forms?

Common pitfalls to avoid when creating PHP evaluation scripts for forms include not properly sanitizing user input, not validating input data, and not handling errors effectively. To solve these issues, always sanitize user input to prevent SQL injection or other security vulnerabilities, validate input data to ensure it meets the expected format, and implement error handling to provide helpful feedback to users. 

// Sanitize user input
$input = filter_input(INPUT_POST, 'input_field', FILTER_SANITIZE_STRING);

// Validate input data
if (empty($input)) {
    echo "Please enter a valid input";
} else {
    // Process the input data
}

// Error handling
try {
    // Code that may throw exceptions
} catch (Exception $e) {
    echo "An error occurred: " . $e->getMessage();
}

Keywords

SQL injection XSS attacks form validation error handling secure coding practices

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