Yesterday development encountered a problem ask what is the reason 0 0

Why Output 1
All the other numbers are normal, that's the 6865 contrast is not normal (this is the point)

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Why Output 1
All the other numbers are normal, that's the 6865 contrast is not normal (this is the point)

Programming should be aware of the truth, never expect to compare the floating-point number is correct, this is the floating point storage method is determined.

You can consider the Bccomp function

Http://www.laruence.com/2011/12/19/2399.html

    $a =68.65;    $b =6865/100;    echo $a.",".$b.", ";    var_dump($a);    var_dump($b);    echo $a > $b ? 1: 0;

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