This is levels worse than what Javascript does though. Most high-level languages have some sort of implicit coercion (even python lets you do truth tests on non-boolean values). The problem here is the programmer isn't confused about types at all. They're comparing two things of the same type: two strings! Nevertheless, given two strings PHP tries to coerce them into ints before carrying out the equality test. Yes, you will have coercion bugs in other languages if you're testing things of different types, but I don't know any other language where a equality test between two things of the same type are automatically coerced into another.