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I originally learned java by using <%=request.getContextPath()%> to get the site root directory, but now I’m confused when learning php
java is
< ;a href="<%=request.getContextPath()%>/html/main/main.jsp">Homepage</a></span>
How to write php
You can use $_SERVER['DOCUMENT_ROOT'] to get
PHP has a magic constant __FILE__ that can be obtained
![[Web front-end] Node.js quick start](https://img.php.cn/upload/course/000/000/067/662b5d34ba7c0227.png)
You can use $_SERVER['DOCUMENT_ROOT'] to get
PHP has a magic constant __FILE__ that can be obtained