PHP 预览PDF时一种错误情况的解决
如图，首先想到的肯定是路径、文件是否存在、文件名等。但是这些问题我都一一排除了，最后就剩下代码了。 我是通过别的网页传递ID然后进数据库找PDF路径的，之前还include了其他的一些php文件，conn肯定是必须的了。 我对代码里的每一行进行逐行注释， 发现
如图，首先想到的肯定是路径、文件是否存在、文件名等。但是这些问题我都一一排除了，最后就剩下代码了。
我是通过别的网页传递ID然后进数据库找PDF路径的，之前还include了其他的一些php文件，conn肯定是必须的了。
我对代码里的每一行进行逐行注释，发现有一行include的代码被注释掉之后就正常了，而且毫无影响，再进那个php里去看一看，我觉得可能跟那个文件里开头有session_start有关。
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