What potential pitfalls should be considered when using checkboxes to modify database data in PHP?

When using checkboxes to modify database data in PHP, one potential pitfall to consider is the security vulnerability of unchecked checkboxes not being sent in the form submission. This can lead to incomplete data processing or unauthorized modifications. To solve this issue, you should always validate the data received from checkboxes and ensure that only expected values are being processed. 

// Example of validating checkbox data before processing
if(isset($_POST['checkbox_name'])) {
    $checkbox_value = $_POST['checkbox_name'];
    // Validate $checkbox_value before using it to modify the database
}

Keywords

SQL injection form validation prepared statements data sanitization checkbox handling

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