I tried to run 'do_fractal_zip.php' and I received about 13,800 Warnings!!! This is a Guiness World record, I guess. Of course, I believe they all refer to the same problem. (Most of them have to do with 'test_files8'. There's no such folder in the package ...)
"Warning: opendir(test_files8,test_files8): The system cannot find the file specified. (code: 2) in ...fractal_zip\fractal_zip.php on line 73"
"Warning: readdir() expects parameter 1 to be resource, boolean given in ...fractal_zip\fractal_zip.php on line 74"
Amazing that there's no documentation/instructions for this big package!