Results for what means it translation from Chinese (Simplified) to English

note that you probably want to specify the mode as an octal number, which means it should have a leading zero. the mode is also modified by the current umask, which you can change using umask().
the mode is 0777 by default, which means the widest possible access.

virtual() is an apache-specific function which is equivalent to !--#include virtual...-- in mod_include. it performs an apache sub-request. it is useful for including cgi scripts or .shtml files, or anything else that you would parse through apache. note that for a cgi script, the script must generate valid cgi headers. at the minimum that means it must generate a content-type header. for php files, you need to use include() or require(); virtual() cannot be used to include a document which is itself a php file.
for php files, you need to use include() or require(); virtual() cannot be used to include a document which is itself a php file.