printf_function   664 Zend/zend.c    	zend_printf = utility_functions->printf_function;
printf_function   547 Zend/zend.h    	int (*printf_function)(const char *format, ...) ZEND_ATTRIBUTE_PTR_FORMAT(printf, 1, 2);
printf_function  2136 main/main.c    	zuf.printf_function = php_printf;