PHP Knowledge Point 3-http head-accept-language

1. Overview
IE uses the Windows default locale to determine the Accept-language property.
Windows default locale can be obtained through the Win32 API function GetUserDefaultLCID.
In addition, the shell API provides getacceptlanguages functions to get the accept-language of IE.
2. Example
accept-language:zh-cn,fr-fr;q=0.5
ZH-CN Chinese
FR-FR French

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