Web Front-end
JS Tutorial
Example of ajax implementation of uploading images, saving them to the background and reading them (graphic tutorial)
Example of ajax implementation of uploading images, saving them to the background and reading them (graphic tutorial)
Below I will share with you an example of ajax implementation of uploading images, saving them to the background and reading them. It has a good reference value and I hope it will be helpful to everyone.
There are two ways to upload pictures:
1.fileReader can parse the picture into base64 code format, simple and crude
2.canvas You can redraw a picture. You can first put the blob of the obtained picture into the canvas, then generate the picture with width, height and transparency, and then convert it into the corresponding type and send it to the background. Currently, png and jpeg are supported. Format.



The above is what I compiled for everyone. I hope it will be helpful to everyone in the future.
Related articles:
Ajax processing user session failure
Ajaxupload multiple file upload
The above is the detailed content of Example of ajax implementation of uploading images, saving them to the background and reading them (graphic tutorial). For more information, please follow other related articles on the PHP Chinese website!
Hot AI Tools
Undresser.AI Undress
AI-powered app for creating realistic nude photos
AI Clothes Remover
Online AI tool for removing clothes from photos.
Undress AI Tool
Undress images for free
Clothoff.io
AI clothes remover
AI Hentai Generator
Generate AI Hentai for free.
Hot Article
Hot Tools
Notepad++7.3.1
Easy-to-use and free code editor
SublimeText3 Chinese version
Chinese version, very easy to use
Zend Studio 13.0.1
Powerful PHP integrated development environment
Dreamweaver CS6
Visual web development tools
SublimeText3 Mac version
God-level code editing software (SublimeText3)
Hot Topics
1378
52
How to solve the problem of automatically saving pictures when publishing on Xiaohongshu? Where is the automatically saved image when posting?
Mar 22, 2024 am 08:06 AM
With the continuous development of social media, Xiaohongshu has become a platform for more and more young people to share their lives and discover beautiful things. Many users are troubled by auto-save issues when posting images. So, how to solve this problem? 1. How to solve the problem of automatically saving pictures when publishing on Xiaohongshu? 1. Clear the cache First, we can try to clear the cache data of Xiaohongshu. The steps are as follows: (1) Open Xiaohongshu and click the "My" button in the lower right corner; (2) On the personal center page, find "Settings" and click it; (3) Scroll down and find the "Clear Cache" option. Click OK. After clearing the cache, re-enter Xiaohongshu and try to post pictures to see if the automatic saving problem is solved. 2. Update the Xiaohongshu version to ensure that your Xiaohongshu
How to post pictures in TikTok comments? Where is the entrance to the pictures in the comment area?
Mar 21, 2024 pm 09:12 PM
With the popularity of Douyin short videos, user interactions in the comment area have become more colorful. Some users wish to share images in comments to better express their opinions or emotions. So, how to post pictures in TikTok comments? This article will answer this question in detail and provide you with some related tips and precautions. 1. How to post pictures in Douyin comments? 1. Open Douyin: First, you need to open Douyin APP and log in to your account. 2. Find the comment area: When browsing or posting a short video, find the place where you want to comment and click the "Comment" button. 3. Enter your comment content: Enter your comment content in the comment area. 4. Choose to send a picture: In the interface for entering comment content, you will see a "picture" button or a "+" button, click
6 Ways to Make Pictures Sharper on iPhone
Mar 04, 2024 pm 06:25 PM
Apple's recent iPhones capture memories with crisp detail, saturation and brightness. But sometimes, you may encounter some issues that may cause the image to look less clear. While autofocus on iPhone cameras has come a long way, allowing you to take photos quickly, the camera can mistakenly focus on the wrong subject in certain situations, making the photo blurry in unwanted areas. If your photos on your iPhone look out of focus or lack sharpness overall, the following post should help you make them sharper. How to Make Pictures Clearer on iPhone [6 Methods] You can try using the native Photos app to clean up your photos. If you want more features and options
How to save pictures without watermark in Xiaohongshu How to save pictures without watermark in Xiaohongshu
Mar 22, 2024 pm 03:40 PM
Xiaohongshu has rich content that everyone can view freely here, so that you can use this software to relieve boredom every day and help yourself. In the process of using this software, you will sometimes see various beautiful things. Many people want to save pictures, but the saved pictures have watermarks, which is very influential. Everyone wants to know how to save pictures without watermarks here. The editor provides you with a method for those in need. Everyone can understand and use it immediately! 1. Click the "..." in the upper right corner of the picture to copy the link 2. Open the WeChat applet 3. Search the sweet potato library in the WeChat applet 4. Enter the sweet potato library and confirm to get the link 5. Get the picture and save it to the mobile phone album
How to make ppt pictures appear one by one
Mar 25, 2024 pm 04:00 PM
In PowerPoint, it is a common technique to display pictures one by one, which can be achieved by setting animation effects. This guide details the steps to implement this technique, including basic setup, image insertion, adding animation, and adjusting animation order and timing. Additionally, advanced settings and adjustments are provided, such as using triggers, adjusting animation speed and order, and previewing animation effects. By following these steps and tips, users can easily set up pictures to appear one after another in PowerPoint, thereby enhancing the visual impact of the presentation and grabbing the attention of the audience.
How to convert pdf documents into jpg images with Foxit PDF Reader - How to convert pdf documents into jpg images with Foxit PDF Reader
Mar 04, 2024 pm 05:49 PM
Are you also using Foxit PDF Reader software? So do you know how Foxit PDF Reader converts pdf documents into jpg images? The following article brings you how Foxit PDF Reader converts pdf documents into jpg images. For those who are interested in the method of converting jpg images, please come and take a look below. First start Foxit PDF Reader, then find "Features" on the top toolbar, and then select the "PDF to Others" function. Next, open a web page called "Foxit PDF Online Conversion". Click the "Login" button on the upper right side of the page to log in, and then turn on the "PDF to Image" function. Then click the upload button and add the pdf file you want to convert into an image. After adding it, click "Start Conversion"
What should I do if the images on the webpage cannot be loaded? 6 solutions
Mar 15, 2024 am 10:30 AM
Some netizens found that when they opened the browser web page, the pictures on the web page could not be loaded for a long time. What happened? I checked that the network is normal, so where is the problem? The editor below will introduce to you six solutions to the problem that web page images cannot be loaded. Web page images cannot be loaded: 1. Internet speed problem The web page cannot display images. It may be because the computer's Internet speed is relatively slow and there are more softwares opened on the computer. And the images we access are relatively large, which may be due to loading timeout. As a result, the picture cannot be displayed. You can turn off the software that consumes more network speed. You can go to the task manager to check. 2. Too many visitors. If the webpage cannot display pictures, it may be because the webpages we visited were visited at the same time.
How to arrange two pictures side by side in wps document
Mar 20, 2024 pm 04:00 PM
When using WPS office software, we found that not only one form is used, tables and pictures can be added to the text, pictures can also be added to the table, etc. These are all used together to make the content of the entire document look richer. , if you need to insert two pictures into the document and they need to be arranged side by side. Our next course can solve this problem: how to place two pictures side by side in a wps document. 1. First, you need to open the WPS software and find the picture you want to adjust. Left-click the picture and a menu bar will pop up, select "Page Layout". 2. Select "Tight wrapping" in text wrapping. 3. After all the pictures you need are confirmed to be set to "Tight text wrapping", you can drag the pictures to the appropriate position and click on the first picture.


