diff -aurN a/ncurses_fe.c b/ncurses_fe.c
--- a/ncurses_fe.c	2012-06-16 13:05:19.000000000 -0400
+++ b/ncurses_fe.c	2019-02-06 10:41:09.000000000 -0500
@@ -123,7 +123,9 @@
 	PHP_FE(ncurses_savetty,			NULL)
 	PHP_FE(ncurses_termattrs,		NULL)
 	PHP_FE(ncurses_use_default_colors,	NULL)
+#ifdef HAVE_NCURSES_SLK_ATTR
 	PHP_FE(ncurses_slk_attr,		NULL)
+#endif
 	PHP_FE(ncurses_slk_clear,		NULL)
 	PHP_FE(ncurses_slk_noutrefresh,		NULL)
 	PHP_FE(ncurses_slk_refresh,		NULL)
@@ -191,7 +193,9 @@
 #ifdef HAVE_NCURSES_ASSUME_DEFAULT_COLORS
 	PHP_FE(ncurses_assume_default_colors,	NULL)
 #endif
+#ifdef HAVE_NCURSES_DEFINE_KEY
 	PHP_FE(ncurses_define_key,	NULL)
+#endif
 	PHP_FE(ncurses_hline,		NULL)
 	PHP_FE(ncurses_vline,		NULL)
 	PHP_FE(ncurses_keyok,		NULL)
@@ -205,6 +209,10 @@
 	PHP_FE(ncurses_waddstr,		NULL)
 	PHP_FE(ncurses_wnoutrefresh,	NULL)
 	PHP_FE(ncurses_wclear,		NULL)
+	PHP_FE(ncurses_wscrl,			NULL)
+	PHP_FE(ncurses_wsetscrreg, 		NULL)
+	PHP_FE(ncurses_scrollok, 		NULL)
+
 #ifdef HAVE_NCURSES_COLOR_SET
 	PHP_FE(ncurses_wcolor_set,	NULL)
 #endif
diff -aurN a/ncurses_functions.c b/ncurses_functions.c
--- a/ncurses_functions.c	2019-06-07 11:00:54.713250845 -0400
+++ b/ncurses_functions.c	2019-02-06 10:41:09.000000000 -0500
@@ -163,16 +163,25 @@
 		*pscr = stdscr;
 		zscr = zend_register_resource(pscr, le_ncurses_windows);
 		ZVAL_RES(&c.value, zscr);
+#if PHP_VERSION_ID < 70300
 		c.flags = CONST_CS;
+#endif
 		c.name = zend_string_init("STDSCR", sizeof("STDSCR")-1, 0);
 		zend_register_constant(&c);
 
+#if PHP_VERSION_ID < 70300
 #define PHP_NCURSES_DEF_CONST(x)    \
 		ZVAL_LONG(&c.value, x);         \
 		c.flags = CONST_CS;         \
 		c.name = zend_string_init("NCURSES_" #x, sizeof("NCURSES_" #x)-1, 0); \
 		zend_register_constant(&c)
 #else
+#define PHP_NCURSES_DEF_CONST(x)    \
+		ZVAL_LONG(&c.value, x);         \
+		c.name = zend_string_init("NCURSES_" #x, sizeof("NCURSES_" #x)-1, 0); \
+		zend_register_constant(&c)
+#endif
+#else
 		zval *zscr;
 
 		*pscr = stdscr;
@@ -188,7 +197,6 @@
 		/* we need this "interesting" arrangement because the
 		 * underlying values of the ACS_XXX defines are not
 		 * initialized until after ncurses has been initialized */
-		
 #define PHP_NCURSES_DEF_CONST(x)    \
 		ZVAL_LONG(zscr, x);         \
 		c.value = *zscr;            \
@@ -1904,6 +1912,66 @@
 }
 /* }}} */
 
+/* {{{ proto int ncurses_wscrl(resource window, int count)
+   Scrolls window content up or down without changing current position */
+PHP_FUNCTION(ncurses_wscrl)
+{
+	zval *handle;
+	zend_long intarg;
+	WINDOW **w;
+
+	if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "rl", &handle, &intarg) == FAILURE) {
+		return;
+	}
+
+	IS_NCURSES_INITIALIZED();
+
+	FETCH_WINRES(w, &handle);
+
+	RETURN_LONG(wscrl(*w, intarg));
+}
+/* }}} */
+
+/* {{{ proto int ncurses_wsetscrreg(resource window, int top, int bot)
+   Set region for scrolling */
+PHP_FUNCTION(ncurses_wsetscrreg)
+{
+	zval *handle;
+	zend_long top, bot;
+	WINDOW **w;
+
+	if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "rll", &handle, &top, &bot) == FAILURE) {
+		return;
+	}
+
+	IS_NCURSES_INITIALIZED();
+
+	FETCH_WINRES(w, &handle);
+
+	RETURN_LONG(wsetscrreg(*w, top, bot));
+}
+/* }}} */
+
+/* {{{ proto int ncurses_scrollok(resource window, bool bf)
+   Enable or disable scrolling of window content */
+PHP_FUNCTION(ncurses_scrollok)
+{
+	zval *handle;
+	zend_bool bf;
+	WINDOW **w;
+
+	if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "rb", &handle, &bf) == FAILURE) {
+		return;
+	}
+
+	IS_NCURSES_INITIALIZED();
+
+	FETCH_WINRES(w, &handle);
+
+	RETURN_LONG(scrollok(*w, bf));
+}
+/* }}} */
+
 /* {{{ proto string ncurses_termname(void)
    Returns terminal name */
 PHP_FUNCTION(ncurses_termname)
@@ -2609,7 +2677,11 @@
 	if (above) {
 #if PHP_MAJOR_VERSION >= 7
 		zend_resource *id = (zend_resource *)panel_userptr(above);
+#if PHP_VERSION_ID < 70300
 		GC_REFCOUNT(id)++;
+#else
+		GC_ADDREF(id);
+#endif
 		RETURN_RES(id);
 #else
 		long id = (long)panel_userptr(above);
@@ -2643,7 +2715,11 @@
 	if (below) {
 #if PHP_MAJOR_VERSION >= 7
 		zend_resource *id = (zend_resource *)panel_userptr(below);
+#if PHP_VERSION_ID < 70300
 		GC_REFCOUNT(id)++;
+#else
+		GC_ADDREF(id);
+#endif
 		RETURN_RES(id);
 #else
 		long id = (long)panel_userptr(below);
diff -aurN a/php_ncurses_fe.h b/php_ncurses_fe.h
--- a/php_ncurses_fe.h	2012-06-16 13:05:19.000000000 -0400
+++ b/php_ncurses_fe.h	2019-02-06 10:41:09.000000000 -0500
@@ -158,6 +158,9 @@
 PHP_FUNCTION(ncurses_prefresh);
 PHP_FUNCTION(ncurses_pnoutrefresh);
 
+PHP_FUNCTION(ncurses_wscrl);
+PHP_FUNCTION(ncurses_wsetscrreg);
+PHP_FUNCTION(ncurses_scrollok);
 PHP_FUNCTION(ncurses_wstandout);
 PHP_FUNCTION(ncurses_wstandend);
 PHP_FUNCTION(ncurses_wattrset);