# Calculation Engine - Formula Function Reference ## General Introduction ### Function that are not Supported in Xls Not all functions are supported by the Excel 5 Writer. Use of these functions within your workbooks will result in an error when trying to write to Xls. The following is the list of those functions that are implemented within PHPExcel, but that cannot currently be written to Excel 5. #### Cube Functions Excel Function | Notes --------------------|--------- CUBEKPIMEMBER | Not yet Implemented CUBEMEMBER | Not yet Implemented CUBEMEMBERPROPERTY | Not yet Implemented CUBERANKEDMEMBER | Not yet Implemented CUBESET | Not yet Implemented CUBESETCOUNT | Not yet Implemented CUBEVALUE | Not yet Implemented #### Database Functions Excel Function | Notes ---------------|--------- #### Date and Time Functions Excel Function | Notes ---------------|--------- EDATE | Not a standard function within Excel 5, but an add-in from the Analysis ToolPak. EOMONTH | Not a standard function within Excel 5, but an add-in from the Analysis ToolPak.