Any of the modes specified in the documentation of
fopen().
Замечание:
Currently, mode is ignored and is always
"rb". This is due to the fact that zip support
in PHP is read only access.
Возвращаемые значения
Возвращает TRUE в случае успешного завершения или FALSE в случае возникновения ошибки.
Замечание:
Unlike fopen() and other similar functions,
the return value of zip_entry_open() only
indicates the result of the operation and is not needed for
reading or closing the directory entry.