Fixed reported by PHPStan v0.12.99 #347
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StudioMaX
commented
Oct 7, 2021
| } | ||
| $floatvalue = ($signbit ? 0 : -0); |
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Initially, there was a warning that this line replaces the result from the previous condition.
But if you look in more detail, this line was always incorrect (even when compared with the previous condition).
According to IEEE 754:
If E=0 and F is zero and S is 1, then V=-0
If E=0 and F is zero and S is 0, then V=0
In practice, there is no difference, since (int) 0 === (int) -0.
Starting from PHP 7.0, floating zero can be negative, but this still does not matter, since (float) 0.0 === (float) -0.0.
Example: https://3v4l.org/jo7Nv
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