Cloud Spanner Client - Class Duration (1.103.0)

 use Google\Cloud\Spanner\SpannerClient;

$spanner = new SpannerClient();

$seconds = 100;
$nanoSeconds = 000001;
$duration = $spanner->duration($seconds, $nanoSeconds); 

 // Duration objects can be cast to json-encoded strings.
echo (string) $duration; 

 $res = $duration->get(); 

 echo $duration->type(); 

 echo $duration->formatAsString();