Example of php plotting technology

Example of php plotting technology

This article shares a php drawing example to learn how to operate graphics technology in php, including drawing various graphics, writing text, copying canvases, and other operations. For more information, see. 1. image format: common image formats, including: gif, jpg/jpeg, and png. Differences: 1). gif images have a high compression rate, but only 256 colors can be displayed, which may lead to loss of colors and display animations. 2). jpg/jpeg images have a high compression ratio (lossy compression) and can be displayed in smaller files. 3). png combines the advantages of gif and jpg. The disadvantage is that animation cannot be displayed. 2. PHP drawing example