The issue is coercion sanity - not that PHP or JS are sane by any other standard to begin with. You can do `0 == "0"` in Javascript (try it now in the devtools

The issue is coercion sanity - not that PHP or JS are sane by any other standard to begin with. You can do `0 == "0"` in Javascript (try it now in the devtools console) and it'll coerce the right hand based on the left hand using parseInt/parseFloat, just like PHP. What it won't do is parse the string "foo" as a zero, which is insane even by Javascript standards. `parseFloat("foo") == parseFloat("foo")` and `parseInt("foo") == parseInt("foo")` in Javascript evaluate to false which is the sane thing to do. `NaN != NaN` is part of the IEEE 754 floating point standard, which predates every single one of the languages you mentioned. We're all competing in the olympics of suffering, so none of us should be promoting this shit :)