Failsafe Production Database Connection

db.conn.php

<?php

$useDevDb = false;                                                                                               
                                                                                                                      
     if (isset($_SERVER['ENVIRONMENT']) && $_SERVER['ENVIRONMENT'] == 'PRODUCTION') {                                 
        $useDevDB = false;                                                                                           
                                                                                                                      
     } elseif ((isset($_SERVER['ENVIRONMENT']))                                                                       
         && $_SERVER['ENVIRONMENT'] == 'DEVELOPMENT'                                                                  
         || $_SERVER['ENVIRONMENT'] == 'BETA') {                                                                      
                                                                                                                      
             $useDevDB = true;                                                                                        
     }