File upload-php upload image can be directly used to determine the type of file suffix? Why, give a detailed example

PHP upload image can be directly used to determine the type of file suffix? Why, give a detailed example

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PHP upload image can be directly used to determine the type of file suffix? Why, give a detailed example

You can, if you like. file header >MINE-Type> filename suffix, but none of them are absolutely secure. Think clearly if someone accidentally made a mistake to pass the suffix of the wrong file, upload the executable file situation what to do.

No, because you can change the name of the non-image suffix to. jpg.

No, because the suffix you can customize. According to @ sell underwear to go online say with getimagesize () judge type is very good.

It's better not to be safe like this.

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