Incorrect. However, (0x33 == '3') will return true, as will (51 == '3'). Your point is valid, even if your code is wrong. Automatic type coercion can produce unexpected results in any language.
PHP's automatic type coercion rules are designed to help newbies at the expense of experienced developers. C's automatic type coercion rules are, largely, designed to expose the underlying memory layout to developers who know what they're doing, at the expense of inexperienced developers. Both can easily contain dangerous pitfalls, but I prefer the latter philosophy over the former.
(Disclaimer: I have built a career as a C programmer and frequently use its lower-level features to great advantage. I am biased.)
