Example of php sending download of various types of files using headers

Example of php sending download of various types of files using headers

Header ('content-type: application/image/pjpeg '); // output type Header ('content-Disposition: attachment; filename = "downloaded.jpg" '); // download the name displayed. Note the format. Readfile('my.jpg '); // Set the type of the file header to be sent, and a download box will pop up. // Download the my.jpg file on the server. the downloaded display and saved name are downloaded.jpg. ?> The so-called implementation of text file download means that when we click a link to a text file, we do not open this file, but bring up a download dialog box for us to download. this is the main question discussed today. The instructions in the PHP help document on triggering PHP download through the header are relatively simple, and there are few articles on this page on the internet. many articles cannot achieve the desired effect. From an accurate point of view, the PHP document is the most accurate, because it provides a concise list of the three statements required for triggering download of text files. take PDF as an example: // We'll be outputting a PDF Header ('content-type: application/pdf '); // It will be called downloaded.pdf Header ('content-Disposition: attachment; filename = "downloaded.pdf "'); // The PDF source is in original.pdf Readfile('original '); ?> These three statements are correct, but some unexpected problems may easily occur during actual use. if you are a very careful person, these problems can also be easily avoided. I am not, so I have encountered such a problem. here I will give a brief description of my problem. For the first sentence, it should be unnecessary. you only need to change the document type. for example, to download a txt file, change it to header ('content-type: application/txt '); the second sentence is nothing to mention, that is, to name your downloaded document. if it is a txt file, you can change it to header ('content-Disposition: attachment; filename=”downloaded.txt "'); the third sentence has many problems. The readfile function reads a file and outputs the file. here, the file contains a real File. if it is an original.txt file under the downloadsfolder, you can write readfile ('downloads/original.txt ') in this way. if the submitted page outputs text and other characters, the downloaded file is a hybrid file of the original original.txt file and the text output on the submitted page. I am missing a careful observation here. I checked the code immediately after reading the following error. I didn't find that the above text is what I needed. I found this part of content, you may soon think about how to solve this problem, that is, to close the output of the text content on the submitted page. The problem is solved, so that the download dialog box is triggered when the text file link is clicked.