Php judges the real format of the video to be uploaded, instead of simply using a suffix. How can this problem be achieved?

How can I know the real video format when I upload a video using php post? How can I know the real video format when I upload a video using php post?

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How can I know the real video format when I upload a video using php post?

$ _ FILES ['filename '] ['type']Or

$ Finfo = finfo_open (FILEINFO_MIME); $ mimetype = finfo_file ($ finfo, $ inputFileName );

Yes.

The suffix can be changed. Generally, the format of a file is determined. Read the first eight bytes of the file.

It is more reliable to take the first 8 bytes.
However, if a specific format corresponds to anything, you should test it yourself.