The way is so annoying.

The path is so annoying.
This code file is under/admin/with the file name a.php

$b =aa;
$a = '. /'. $b;
mkdir ($a, 0700);

The resulting path is the previous layer. That should be/aa/to generate a directory like this. Domain Access http://a.com/aa/that's right.

The last layer of the old is not available.

Share to:

------Solution--------------------
mkdir ($a, 0666);

Let's see if the catalog is generated.
Because there is no file in the AA, it is impossible to access
------Solution--------------------
$b =aa; should be $b= ' AA ';

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