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文件后缀和文件类型有什么区别?文件后缀名不就规定了文件类型吗?
phpcn_u226
phpcn_u226 2016-12-26 11:22:46
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文件后缀和文件类型有什么区别?文件后缀名不就规定了文件类型吗?

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数据分析师
数据分析师2017-09-30 23:47:50 2 floor

What is the difference between file suffix and file type? Doesn’t the file suffix specify the file type? -PHP Chinese Q&A - What is the difference between file suffix and file type? Doesn’t the file suffix specify the file type? -PHP Chinese Online Q&A

Watch it and learn.

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阿神
阿神2016-12-26 11:23:08 1 floor

通过后缀名来判断的不一定是真正的图片，因为后缀名是可以更改的

用文件类型来判断是否为真实的图片就是防止有人恶意通过更改后缀名来上传文件

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