php - require once gives error while including credential file for different condition

Question

I am including email credentials file. I have to send mail for user registration and one for user reviews. That works for different condition. I am using require once 2 times. When I used require_once in both conditions it gives error not defined mail variable. When I used only require then there is no error. Actually I am not getting why this happen. Please let me know. I am using codiegniter.

Answer 1

等待大神答复