$realpath_root 和 $document_root 区别

$realpath_root:

an absolute pathname corresponding to the root or alias directive’s value for the current request, with all symbolic links resolved to real paths

如果是符号链接,$realpath_root指向符号链接的真实路径

$document_root:

root or alias directive’s value for the current request

$document_root 是root或alias指定的值