How do I include a file over 2 directories back?

Question

How do you include a file that is more than 2 directories back. I know you can use ../index.php to include a file that is 2 directories back, but how do you do

Answer 1

if you are using php7 you can use dirname function with level parameter of 2, for example :

dirname("/usr/local/lib", 2);

the second parameter "2" indicate how many level up

dirname referance