Is it advisable to grant a user access only if the corresponding entry is present in the database when dealing with checkbox values?

When dealing with checkbox values, it is advisable to grant a user access only if the corresponding entry is present in the database to ensure data integrity and security. This can be achieved by checking if the checkbox value is true or checked, and then verifying if the corresponding entry exists in the database before granting access. 

// Assuming $checkboxValue is the value of the checkbox
if ($checkboxValue == true) {
    // Check if corresponding entry exists in the database
    $query = "SELECT * FROM users WHERE checkbox_value = 1";
    $result = mysqli_query($connection, $query);

    if (mysqli_num_rows($result) > 0) {
        // Grant user access
        echo "Access granted!";
    } else {
        // Deny access
        echo "Access denied!";
    }
}

Keywords

PHP database checkbox validation security

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