php判断两个浮点数是否相等的方法_php技巧

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Release: 2016-05-16 20:20:52
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本文实例讲述了php判断两个浮点数是否相等的方法。分享给大家供大家参考。具体分析如下:

由于浮点数直接用==判断是否相等是不完全正确的,所以下面给出了一个方法,先设定的一个精度,如果在精度范围内相等则认为相等,否则认为不能

<&#63;php
$delta = 0.00001;
$a = 1.00000001;
$b = 1.00000000;
if (abs($a - $b) < $delta) { /* $a and $b are equal */ }
&#63;>
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希望本文所述对大家的php程序设计有所帮助。

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