debugging - how to judge the request is from my computer to the php page? -

how can determine if request computer php page?

i want print_r($gloabals) debug site computer, don't want other computers this.

<?php   // can not use ip judge wheather computer mine    // ip change always.   if($is_my_computer){     echo 'yes'; } 

i suppose in local machine have website under localhost/mylocalwebsite. if so, check if in environment , it.

<?php   if($_server['server_name'] == 'localhost') {     echo "foo";   }