zend_extension?

I'm trying to build a zend_extension with a statement_handler() hookup. In the course, I ran into several problem and one of the major one is inside the function zend_eval_string(). In there, it always set CG(no_extensions)=1 before entering the zend_execute() function, and reset CG(no_extensions)=0 afterward. With no_extensions set to true, there is no chance for zend_extension_statement_handler to register inside function zend_ext_stmt_handler(). Is anyone out there ever implement a zend extension with statement_handler()? Or anyone know why no_extension is turn ON before zedn_execute() is called? Thanks, -Kendal