Just another type coercion thingie.

Check this out:

<?
var_dump(1 == "1 dog"); // true
var_dump(1 == "1 cat"); // true
var_dump("1 cat" == "1 dog"); // false

var_dump(1 == "0x1 dog"); // true
var_dump("1 dog" == "0x1 dog"); // false

Result:

bool(true)
bool(true)
bool(false)
bool(true)
bool(false)

Transitivity is none of the things that the "==" operator respects at all. Using the "===" comparator works (in this case). Yet I find this thing funny.