return 1 and return 0 VS return true and return false [closed]

Question

Me and my colleague were arguing about how to return booleans in PHP functions.

Which one do you use and why?

return 0;
return 1;

OR

return false;
return true;

It is clear that first variant it wouldn't work fine in programming languages with strict typing, but it will work absolutely fine in PHP in most cases.

I use first more logical variant, but I couldn't come up with good arguments but "return boolean if you want to return a boolean" and "more readable", but they are quite weak.

Answer 1

• option with true / false more popular
• harder to get confused in the code
• return Boolean true / false is clear to all, rather than 1/0