What are the potential pitfalls of using hidden fields to pass data in PHP forms?

One potential pitfall of using hidden fields to pass data in PHP forms is that they can be easily manipulated by users, leading to security vulnerabilities such as data tampering. To solve this issue, you can use server-side validation and verification to ensure the integrity of the data being passed through hidden fields. 

// Server-side validation and verification example
if ($_POST['hidden_field'] == 'expected_value') {
    // Process the form data
} else {
    // Handle the case where hidden field value is unexpected
    echo "Error: Unexpected value in hidden field";
}

Keywords

hidden fields data passing security risks form handling input validation

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