PHP knowledge point 3-HTTP header-Accept-Language

1. Overview
IE uses the Windows default locale to determine the Accept-Language attribute.
Windows default locale can be obtained through the Win32 API function GetUserDefaultLCID.
In addition, the shell API provides the GetAcceptLanguages ​​function to obtain IE's Accept-Language.
2. Example
Accept-Language: zh-CN,fr-FR;q=0.5
zh-CN Chinese
fr-FR French

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