Php fopen download file

Date published: Mar TL;DR: I abused a content delivery functionality that only allowed a specific domain to read local files on the server by providing the domain name as a file and abusing a path traversal issue. You do realize that setting the executing scripts headers has not that much impact over the query he is trying to do to an external url via fopen. His code works, there is nothing wrong with using fopen, his only problem comes from the fact that he is passing 0 as the content-length header.

But my question was about the headers set for what the current php script will return meaning, the use of header and it's influence over the query he was doing with fopen on an external url. I hope I clarified it. No images were imported. Ram Sharma Ram Sharma 8, 7 7 gold badges 40 40 silver badges 54 54 bronze badges.

Change header "Content-Length: ". Sign up or log in Sign up using Google. Sign up using Facebook. Sign up using Email and Password. It is used to bind a resource to a steam using a specific filename.

The filename and mode to be checked are sent as parameters to the fopen function and it returns a file pointer resource if a match is found and a False on failure. It starts at the beginning of the file.

Exceptions: When writing to a text file, the correct line-ending character should be used based on the platform. When safe mode is enabled, PHP checks whether the directory in which the script is operating has the same UID owner as the script that is being executed. Below programs illustrate the fopen function. Skip to content. Change Language. Report Error. Your message has been sent to W3Schools.

W3Schools is optimized for learning and training. Examples might be simplified to improve reading and learning. Tutorials, references, and examples are constantly reviewed to avoid errors, but we cannot warrant full correctness of all content. I was not checking the filename part of a concatenated string. I tried append mode and it errors out so does not seem to be dangerous. This is with FreeBSD 4. Behaves the same on 4. I was working on a consol script for win32 and noticed a few things about it.

On win32 it appears that you can't re-open the input stream for reading, but rather you have to open it once, and read from there on. Also, i don't know if this is a bug or what but it appears that fgets reads until the new line anyway. The number of characters returned is ok, but it will not halt reading and return to the script.

I don't know of a work around for this right now, but i'll keep working on it. This is some code to work around the close and re-open of stdin. Which contains an array of the response header. Also avoid these names followed immediately by an extension; for example, NUL. For more information, see Namespaces" it is a windows limitation. So if you have the same problem, goto your php.

Open for reading only; place the file pointer at the beginning of the file. Open for reading and writing; place the file pointer at the beginning of the file.