How to upload files and images asynchronously with ajax
This time I will show you how ajax can upload files and pictures asynchronously. What are the precautions for ajax to upload files and pictures asynchronously. Here is a practical case, let’s take a look.
Hello everyone, in this article I want to share with you the code for the file upload function of a webpage. I hope you can have some reference or give me some suggestions.
As we all know, most major websites nowadays basically have a file upload function. Users can save their favorite pictures or other files online so that they can be easily found when they are used in the future. But the files of a web page How to set up the upload function? Today I will take image upload as an example to show you the specific steps of the file upload function.
In fact, there are two ways to upload files, one is from form submit submission, and the other is asynchronous submission through ajax. However, a problem with form form submission is that the interface will be refreshed every time the upload is completed, which cannot be implemented. Asynchronous upload, so now almost all websites use ajax asynchronous upload. Now I will show you how to implement ajax asynchronous upload.
First I create a form form, the code is as follows:
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After the creation is completed, first we need to get the information of the image uploaded by the user from this book, the code is as follows
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The formData here is the object we want to store file information now, and then we need to submit it to the backend using an ajax request:
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Then after our request is successful, the backend must handle it accordingly. And save the pictures to the specified folder, so the corresponding PHP should complete these operations:
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In this way, we have completed all the steps of file upload. If you want to upload your favorite pictures to yourself on the web page, I hope this code can help you!
Attachment: If you need to attach other information about yourself when uploading a file, you only need to add this code after the front-end page request is completed:
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I believe you have read this article You have mastered the case method. For more exciting information, please pay attention to other related articles on the PHP Chinese website!
Recommended reading:
jQuery implements asynchronous refresh
How jQuery issues get and post requests to the server
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