Download Php Question Answer
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I want the user to be able to download some files I have on my server, but when I try to use any of the many examples of this around the internet nothing seems to work for me. I've tried code like this:
So basically it will appear to be a download link to file 'sample.pdf' but the problem is, there's a restriction in downloading this file. so whenever there are confidential reports uploaded and a malicious user accidentally memorized or viewed the URL of the download link in the browser history he can easily download it even without accessing the website because it is a direct link. What am i supposed to do so this link will be protected? or be downloaded only for the user assigned to it?
Your current method is very insecure for sensitive files. A malicious user could trivially write a script to download ALL files in res/pdf. All he needs to do is check every permutation of letters in the directory, and throw away all 404 errors.
In case you have to download a file with a size larger than the allowed memory limit (memory_limit ini setting), which would cause the PHP Fatal error: Allowed memory size of 5242880 bytes exhausted error, you can do this:
In the above example, I am downloading a test.zip (which was actually the android studio zip on my local machine).php://output is a write-only stream (generally used by echo or print).after that, you just need to set the required headers and call stream_copy_to_stream(source, destination).stream_copy_to_stream() method acts as a pipe which takes the input from the source stream (read stream) and pipes it to the destination stream (write stream) and it also avoids the issue of allowed memory exhausted so you can actually download files that are bigger than your PHP memory_limit.
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I don't really want to click the link to find out, but I would love to get to know what this PHP file is about to do. Is there a way of downloading the script, such as you could with the client-sided JavaScript?
If the server is configured correctly, you cannot download a PHP file. It will be executed when called via the webserver. The only way to see what it does is to gain access to the server via SSH or FTP or some other method.
I recently had the pleasure of patching this in a project I inherited, hence why I know about it. One could directly download PHP scripts by giving the name of the desired script over the $_GET[] which would count.
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