.ab.file, how to make it access only the ab directory_PHP tutorial

'./a/b/'.$file, how to make it only access the a/b directory

'./a/b/'.$file
If $file = '../1.php'
You can access /a/1.php
$file is entered by the user and is only allowed to access files under './a/b/'. What to do

Let me answer




D8888D reply content------------------------------------------------- ----------
Take the first two characters and see if they are ".."
If so, block

http://www.bkjia.com/PHPjc/632539.htmlwww.bkjia.comtruehttp: //www.bkjia.com/PHPjc/632539.htmlTechArticle'./a/b/'.$file, how can I make him access only the a/b directory' ./a/b/'.$file If $file = '../1.php', you can access /a/1.php. $file is entered by the user and only allows access to './a/b/'. The following text...