I am making a search script and want to stop any deep level search for files and folders outside of the web document root.
In case the user passes in something like ../../../../../../
I want to capture it and convert it into the absolute path that it points to, then perform some sanitation checks.
So in the example if ../../../../../
is converted to /
I want to replace /
with $_SERVER['DOCUMENT_ROOT']
or any other function in PHP to push the search and lock it in the web server root.