[pilif]

"Fixing" broken data silently is tremendously bad behaviour in general because you can't possibly know whether the caller knew that they were providing invalid data and whether the caller is going to be happy with your fix.

If you expect input parameters in some range and you get values out of that range, then you blow up. You don't silently truncate anything and you certainly don't reduce the entropy of your random number generator by nearly 50%.

[FranOntanaya]

This was my main doubt about PHP 7's scalar types, which will autocast values into the desired types. I don't expect the caller to know better than the callee what are the method's boundaries, and once casted you may not be able to see if the input was garbage. But yeah, when something breaks the method's author can wash their hands.