Fatal error: Uncaught Error: Undefined constant "P_G_MERCHANT_ID" in /home/eatygiya/public_html/taxi.dropfiles/lib/pgateways/paytr/paytr-transaction-init.php:3 Stack trace: #0 {main} thrown in /home/eatygiya/public_html/taxi.dropfiles/lib/pgateways/paytr/paytr-transaction-init.php on line 3