PHP graphics and text, there is no result on the right side of the code submission. Is there something wrong with my configuration?

Question

Can anyone guide me on what plug-ins or clients I need to install to use it normally?

https://www.php.cn/code/4800.html

Answer 1

It is better to deploy the environment locally. Browser testing is likely to have some unpredictable errors

Answer 2

It is recommended to install the integrated environment on your local machine and learn programming. The online environment version and syntax may not meet your needs