php复杂的布尔表达式

Question

I went to a job interview yesterday and I got the following test question:

What is the output of this logic:

if(TRUE && FALSE AND TRUE OR 1 || TRUE && ((TRUE || FALSE) || FALSE)) {
   PRINT "A";
} 
else print "B";

I had to evaluate the result in my head, which I could not do.

How would you go about this?

Answer 1

The expression has in the middle, outside any parenthesis: OR 1 ||. It does not matter how the left and right expressions evaluate, at the end they are combined with OR TRUE and the result is always TRUE.

The printed value is A.