DATE_FORMAT_RFC2822  850 ext/date/php_date.c 	REGISTER_STRING_CONSTANT("DATE_RFC2822", DATE_FORMAT_RFC2822, CONST_CS | CONST_PERSISTENT);
DATE_FORMAT_RFC2822 2042 ext/date/php_date.c 	REGISTER_DATE_CLASS_CONST_STRING("RFC2822", DATE_FORMAT_RFC2822);