What are the potential pitfalls of not properly evaluating all values from a selectbox in PHP?

If not properly evaluating all values from a selectbox in PHP, you may encounter security vulnerabilities such as SQL injection or cross-site scripting attacks. To prevent this, always sanitize and validate user input before using it in your code. Additionally, make sure to handle all possible options from the selectbox to avoid unexpected behavior or errors. 

// Example of properly evaluating all values from a selectbox in PHP

// Get the selected value from the selectbox
$selectedValue = $_POST['selectbox'];

// Validate and sanitize the input
$selectedValue = filter_var($selectedValue, FILTER_SANITIZE_STRING);

// Handle all possible options from the selectbox
switch($selectedValue) {
    case 'option1':
        // Perform actions for option 1
        break;
    case 'option2':
        // Perform actions for option 2
        break;
    default:
        // Handle any other cases or display an error message
        break;
}

Keywords

PHP selectbox values evaluation validation

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