filegroup Gets file group &reftitle.description; intfilegroup stringfilename Gets the file group. The group ID is returned in numerical format, use posix_getgrgid to resolve it to a group name. &reftitle.parameters; filename Path to the file. &reftitle.returnvalues; Returns the group ID of the file, or &false; in case of an error. The group ID is returned in numerical format, use posix_getgrgid to resolve it to a group name. Upon failure, &false; is returned. &reftitle.examples; ]]> &reftitle.errors; Upon failure, an E_WARNING is emitted. &reftitle.notes; ¬e.clearstatcache; &tip.fopen-wrapper.stat; &reftitle.seealso; fileowner posix_getgrgid safe_mode_gid