You should not have any directories within your website root that has the permissions required for file upload. If you are going to do a file upload, I recommend you use the PHP FTP Functions in conjunction with your file field, that way the files are transferred to a remote FTP location separate from your server.
This is simpler method of checking for too much POST data alternative to that by v3 from sonic-world. MIME type can be faked. This mime type is however not checked on the PHP side and therefore don't take its value for granted.
When file names do contain single quote parts of the filename are being lost. I had to set the following to get it to work: 1. Write permissions on the the folder through the IIS management console. Write permissions to "Domain Users" in the folder's security settings. The third setting was required because my application itself lives in a secure folder - using authentication either Basic or Windows Integrated to identify the users. Also, remember to set "Execute Permissions" to "None" in the IIS management console, so that people can't upload a script file and then run it.
Other checks of the uploaded file are recommended as well but 'Execute None' is a good start. It should be POST. Default method of a form is GET.
People have remarked that incorrect permissions on the upload directory may prevent photos or other files from uploading. Setting the Apache owner of the directory incorrectly will also prevent files from uploading -- I use a PHP script that creates a directory if it doesn't exist already before placing an uploaded file into it.
When the script creates the directory and then copies the uploaded file into the directory there is no problem because the owner of the file is whatever Apache is running as, typically "nobody". However, lets say that I've moved the site to a new server and have copied over existing file directories using FTP. In this case the owner will have a different name from the Apache owner and files will not upload.
This may help a newbie to file uploads.. If you are using -windows xp -iis 5 -php 5 If you keep getting permission errors on file uploads Make sure all accounts have write access to your upload directory, and read access if you wish to view these files later.
You might have to chmod the directory or file afterwards as well if you're still getting access errors. When uploading large images, I got a "Document contains no data" error when using Netscape and an error page when using Explorer. I found out that the following entry in the httpd. There is a nicer way of storing the data directly. By the way, I'd like to thank therebechips for his excellent advice on data chunks.
If your upload script is meant only for uploading images, you can use the image function getimagesize does not require the GD image library to make sure you're really getting an image and also filter image types. Hence if the uploaded file exceeds the php max file size then php end abruptly without a trace of error that is it behaves like no file is uploaded and hence no error reported.
Sure if uploading a file is optional for a form then a user who uploads larger file will get no error and still the form will be processed only without the file. Your validation code is also rather hideous, and you're simply assuming the upload succeeded. Add a comment.
Active Oldest Votes. Improve this answer. Didn't work. It changes file extension as well. And how can I see, it doubles files original name. JasonOOO — papi. For example: When I upload first: 9gag. I want it to be random? Works great now. Not really how I wanted, but I think it's alright.
Thank you very much! And btw, do you know how to apply Ajax Percentage while file is being uploaded? Willem Van Onsem Willem Van Onsem k 28 28 gold badges silver badges bronze badges. Sign up or log in Sign up using Google. Select basic ads. Create a personalised ads profile. Select personalised ads. Apply market research to generate audience insights. Measure content performance.
Develop and improve products. List of Partners vendors. Share Flipboard Email. By Angela Bradley Angela Bradley. Angela Bradley is a web designer and programming expert with over 15 years of experience. An expert in iOS software design and development, she specializes in building technical hybrid platforms. Learn about our Editorial Process. Featured Video. Cite this Article Format. Bradley, Angela. Common File Types and File Extensions.
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