How can the error "Fatal error: Call to undefined method DB_Error::fetchRow()" be resolved in PHP?

The error "Fatal error: Call to undefined method DB_Error::fetchRow()" occurs when trying to call the fetchRow() method on a DB_Error object, which is not a valid method for that object. To resolve this issue, you need to make sure you are using the correct DB object that supports the fetchRow() method, such as a database result object.

// Assuming $db is a valid database result object
$row = $db->fetchRow();