The code may look as follows: Īs a result, you will get the following upload interface: upload_max_filesize should be big enough to allow uploading typical files (but not too big as it may negatively impact the security).Īfter configuring PHP you should add basic HTML form to the page.upload_tmp_dir should point to a folder where you want to keep temporary files.To let your application upload files successfully you should configure PHP by making the following changes to the php.ini file: Despite the quite limited functionality, it is the simplest way to organize file uploads that will work in any browser and on any platform. The client applications consist of an HTML form with the Browse button, which opens a select file dialog, and Submit, which sends a request. This approach was introduced in early days of the Internet. Let’s start with the simplest way – single file upload using the good old Browse button. We’ve figured out how the uploads are organized in PHP at a high level, but now it’s time to look into it in a more detailed fashion. You may also carry out some additional actions such as updating the database, etc. So the upload scenario is to go through each element of the $_FILES collection and copy it to an appropriate location. Cleans up the temporary folder after the script execution is finished.Automatically creates $_FILES collection, which refers to the uploaded files.Saves uploaded files to a temporary folder on the server (specified by upload_tmp_dir in the php.ini file configuration).After the server receives the upload request it performs the following actions: Using PHP you don’t have to parse the HTTP request manually. Meanwhile, let’s take a look at how the server part works. It always consists of two parts: a client application, which puts files for upload into a binary data block formed in accordance with an HTTP protocol, and a server, which receives this binary package, parses it, and saves the uploaded files on a server hard disk.Ĭlient applications can be implemented in different ways – using simple elements, HTML5, Flash, Java, or even ready-to-use uploader applications. There is no magic in the uploading process. like generate thumbnails, rotate, crop, add watermarks, etc.īefore examining different upload methods let’s see how file upload works in general. If you upload images, you may want to preprocess them before the upload, i.e. You should choose the upload mechanism based on your requirements: whether your users need to upload one or multiple files at a time, send entire folders or just files, work with files of small or very large size, accept only particular file types (like images) or files of any other type. PHP provides several different ways to upload files from a user computer to the remote server. Whether it is a single picture for an avatar or a batch of files sent to place an order, you want to make the upload process easy, fast, and reliable. When you are creating a website, it is often necessary to give users some way to upload files from their computer to the server.
#PHP FILE UPLOAD EXAMPLE HOW TO#
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