caseChange hook

function myext_civicrm_caseChange(\Civi\CCase\Analyzer $analyzer) {

$emailRecipient = 'myemailaddress@gmail.com';
            $emailSubject = "Case data from hook";
            $emailBody = "Contents of $Analyzer: " . print_r($analyzer);
            mail( $emailRecipient, $emailSubject, $emailBody );
}