请教php怎么判断pdf是否被加密了

WBOY
Release: 2016-06-13 10:57:20
Original
1278 people have browsed it

请问php如何判断pdf是否被加密了
是权限密码,就是可以浏览,无法修改的那种

我在做一个转换程序,如果加密了,直接卡死在那里,如果不解决可能直接导致项目流产哇...

------解决方案--------------------
加密了,就会有加密了的标志
你知道了加密原理,就可以找到加密标志
至于是用什么语言,并不是问题

Related labels:
source:php.cn
Statement of this Website
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn
Popular Tutorials
More>
Latest Downloads
More>
Web Effects
Website Source Code
Website Materials
Front End Template