php判断上传视频的真实格式，不是简单的用后缀来判断，怎么做到？
用php的post方式上传视频，怎么知道视频的真实格式？
回复内容：
用php的post方式上传视频，怎么知道视频的真实格式？
$_FILES['文件名']['type']或者
<code>$finfo = finfo_open(FILEINFO_MIME); $mimetype = finfo_file($finfo, $inputFileName);</code>
都可以吧
后缀都可以改，一般确定一个文件的格式，是读取这个文件的前8个字节吧
取前8个字节进行判断比较靠谱。
不过某个格式对应的是什么就要你自己去测试了。
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