RE: [PHP] Math Weirdness

[snip] for most of what the majority of php/script apps deal with, it's probably safe to assume that addition/subtraction will be safe, but i can think of numerous examples where this isn't true... [/snip] As demonstrated by the example I provided, just checking the difference (or lack thereof) between two floats brought the issue to light. I think that this falls into the same category that cleaning input data does in the fact that it should always be done. While there is a joke about "skimming" the diffs it just demonstrates that the mathematical constructs we use based on a digital platform leaves room for error...and the errors add up really quickly because the platforms are so darn much quicker than we are.