Create BiffWriter demo files:

1 Create a generic demo file showing all functions
2 Show class Source
3 Show demo source
4 Numeric boundary check file
5 Create a huge file > 4MB

6 Save to file, otherwise stream contents to browser:
Notes:
The above will only work if the test script and biffwriter is an PHP enabled directory.
Option 4 is important!!! Please check that the created Excel file has the correct numbers!
Option 5 will take some time depending on your server load. It creates 1000 rows x 256 columns filled with floating point numbers. The output file is > 4MB.