Using the below script, you can auto refresh the output of your PHP script in a browser. Place the code on the first line of your PHP script.
<?php header('Refresh: 10'); ?>
Here 10 is the value in seconds, in the code above, your PHP page will refresh every 10sec regardless if there are changes in the data or none.
<?php header( 'refresh: SECOND; url= ADDRESS' ); ?>
Here ADDRESS is optional, if you omit the address it will refresh its self, if address is present it will redirect to the destination URL or destination page