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PHP 小数的计算模式太坑爹了吧

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Release： 2016-06-13 12:43:20
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PHP 小数的计算方式太坑爹了吧?
if(0.030 != (0.530-0.500+0+0))
{
   $s = 0.530-0.500+0+0;
   $s = 0.03 - $s;
}


这居然不相等??
相减后居然不是0 

这PHP 是外星计算法吗?

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