Weird bug , PHP code get prints in browser screen instead execution -

I am making some code, but it is very strange that the code gets printed on the screen, I do not have any

This is a very annoying problem to ensure that there is an error to check your web server logs, but I doubt it will be useful I can solve the problem by using die () Do not; Try to break the script in the script and split the problem of some variables on the screen using var_dump and / or print_r and try to break the script in Paes.