How to draw through PHP programming

This article mainly shows you "how to draw through PHP programming", the content is easy to understand, clear, hope to help you solve your doubts, the following let the editor lead you to study and learn "how to draw through PHP programming" this article.

1. Picture format: at present, the common picture format in website development is gif,jpg/jpeg,png.

Difference:

Gif image compression ratio is high, but can only display 256colors, may cause color loss, can display animation

Jpg/jpeg images have a high compression ratio (lossy compression), which can be displayed in smaller files, and are often used on web pages.

Png this format combines the advantages of gif and jpg, but its disadvantage is that it cannot display animation.

2. Draw through PHP programming.

The code is as follows:

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