We will create a PHP file with the following code to download a file from the file path. The PHP code in the previous example will be slightly modified to download the file from the given path. The clearstatecache function is used to clear the cache that was previously stored.
Two arguments are used in the readfile function. Output After the download link of the PDF file is clicked, the following output will appear. This article provided a simple way to forcibly download any file using the PHP script, to help readers to add the download feature in their script.
I am a trainer of web programming courses. I like to write article or tutorial on various IT topics. Generally, no PHP script is required to download a file with the extensions exe and zip. If the file location of this type of file is set in the href attribute of the anchor element, then the file automatically downloads when the user clicks on the download link. Stack Overflow for Teams — Collaborate and share knowledge with a private group.
Create a free Team What is Teams? Collectives on Stack Overflow. Learn more. Force Downloading file through php not working Ask Question. Asked 8 years, 11 months ago. Active 8 years, 11 months ago.
Viewed 7k times. Improve this question. Tarun Tarun 2, 3 3 gold badges 25 25 silver badges 42 42 bronze badges. You just output a header and the module takes care of the rest. This is the source of many seemingly obscure errors. If you have output buffering, the file will not be sent to the user in chunks but only at the end of the script.
At the start of your script, after checking the file if it exists, etc. Be aware that multiple ranges can be specified e. If the range is not valid, you must output. Do not try to guess or fix the range s as it may result in corrupted downloads, which are more dangerous than failed ones.
Many developers forget to send the code or the Accept-Ranges. Yet others forget that when you send a range, the Content-Length must match the length of the range rather than the size of the whole file. You can output the file using the method described above, skipping until the start of the range and delivering the length of the range.
I did my best to provide only accurate information. It would be truly sad for me if an article about avoiding common PHP errors contained errors itself. Regardless, my point stands: PHP makes it easy to hack together code that appears to be working, but developers should read and adhere to the official specifications. File handling is an important part of any web application. You often need to open and process a file for different tasks. You can do a lot of damage if you do something wrong.
Common errors are: editing the wrong file, filling a hard-drive with garbage data, and deleting the content of a file by accident. The readfile function reads a file and writes it to the output buffer.
Assume we have a text file called "webdictionary.
0コメント