The php_generated.txt file was generated by running parse_types.py on the source code of php.

Possible improvements:

• Callbacks are currently unused (<fuzzfunction> always point to phpinfo). Generating callback code in a similar manner to the main function could potentially expose additional bugs, especially if callbacks get access to the same variables / can mess up stuff that the caller didn't expect.
• Currently, the return values from the function / method calls are ignored. In cases where function / method calls return non-trivial types, it be better to store these return values in variables and use them as function arguments in later calls or potentially call methods on these "generated" objects.
• It would be great to be able to infer the expected classes of the objects parameters taken by functions/methods.
• The parse_type.py code is ugly, and should be refactored a bit.
• Randomize the references ($ref_ in template.php).