Description:
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From manual page: https://php.net/function.bccomp
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This code: var_dump(bccomp(-INF, 1.0, 2)); produces error

PHP Warning:  bccomp(): bcmath function argument is not well-formed

But according to docs (https://www.php.net/manual/en/math.constants.php) INF is float, so I think, that this Warning is wrong.

Test script:
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var_dump(bccomp(-INF, 1.0, 2));

Expected result:
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No warning

Actual result:
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PHP Warning:  bccomp(): bcmath function argument is not well-formed