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为啥POST过来的sha1加密字符串相等的判断不对呢

WBOY
Release： 2016-06-13 12:44:04
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为什么POST过来的sha1加密字符串相等的判断不对呢。
比如我表单post过来了sha1('1')这个加密后的字符串356a192b7913b04c54574d18c28d46e6395428ab。
然后我if($_POST['s']=='356a192b7913b04c54574d18c28d46e6395428ab')
为什么判断为false？
echo $_POST['s']也是356a192b7913b04c54574d18c28d46e6395428ab啊。。

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