Retrieving Protected Model Attributes in Laravel When Importing Data

When importing a subset of data from one Laravel project to another, developers often use the chunkById method to fetch records in batches (e.g., 2,000 rows at a time) and then insert them into the target database. However, the fetched model instances expose their data as a protected attributes property, which is returned as an array of private fields, making it cumbersome to assemble a bulk insert array.

The solution is to bypass the accessor by casting the model object to an array and retrieving the protected property directly. In PHP, protected properties are stored with a special key that consists of a null byte (ASCII 0), an asterisk, and another null byte followed by the property name. By constructing this key with chr(0) . '*' . chr(0), the value can be accessed without reflection.

Utility function:

public function getProtectedValue($obj, $name) {
    $array = (array)$obj;
    $prefix = chr(0) . '*' . chr(0);
    return $array[$prefix . $name];
}

Usage example for the "attributes" property:

$arrTemp = $this->getProtectedValue($value, 'attributes');

After obtaining $arrTemp, it can be passed directly to the bulk insert operation, simplifying the data migration process.