The difference between require, include and use in php. The difference between include and require. require include performance. lua include require.

The difference between require and include is just that the error is reported when the file does not exist. The former stops the script and the latter continues execution. They all import a file, execute the imported file after the introduction, and continue to execute the current file after the execution is completed.
So the parameter value is the file address, use the left slash "/";

use is to use the namespace, so the parameter value is the namespace, use the right slash ""

The namespace and the file path do not necessarily correspond directly !

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The above introduces the distinction between require, include, and use in PHP, including the content of require and include. I hope it will be helpful to friends who are interested in PHP tutorials.