本文实例讲述了php实现不通过扩展名准确判断文件类型的方法。分享给大家供大家参考，具体如下：
第一种方法
通过php的finfo_file()
$handle=finfo_open(FILEINFO_MIME_TYPE);//This function opens a magic database and returns its resource.
$fileInfo=finfo_file($handle,'./test.txt');// Return information about a
filetype.py
Small and dependency free Python package to infer file type and MIME type checking the magic numbers signature of a file or buffer.
This is a Python port from filetype Go package. Works in Python +3 .
一个小巧自由开放Python开发包，主要用来获得文件类型。包要求Pyt
