diff --git a/400_xowa/src/gplx/xowa/mediawiki/XophpBool.java b/400_xowa/src/gplx/xowa/mediawiki/XophpBool.java
new file mode 100644
index 000000000..6f774e539
--- /dev/null
+++ b/400_xowa/src/gplx/xowa/mediawiki/XophpBool.java
@@ -0,0 +1,40 @@
+/*
+XOWA: the XOWA Offline Wiki Application
+Copyright (C) 2012-2017 gnosygnu@gmail.com
+
+XOWA is licensed under the terms of the General Public License (GPL) Version 3,
+or alternatively under the terms of the Apache License Version 2.0.
+
+You may use XOWA according to either of these licenses as is most appropriate
+for your project on a case-by-case basis.
+
+The terms of each license can be found in the source code repository:
+
+GPLv3 License: https://github.com/gnosygnu/xowa/blob/master/LICENSE-GPLv3.txt
+Apache License: https://github.com/gnosygnu/xowa/blob/master/LICENSE-APACHE2.txt
+*/
+package gplx.xowa.mediawiki; import gplx.*; import gplx.xowa.*;
+public class XophpBool {
+	public static boolean is_true(byte[] val) {return val != null && is_true(String_.new_u8(val));}
+	public static boolean is_true(String val) {
+		// REF: https://www.php.net/manual/en/language.types.boolean.php#language.types.boolean.casting
+		if (String_.Len_eq_0(val)) return false; // the empty String ...
+		String val_upper = String_.Upper(val);
+		if (String_.Eq(val_upper, "FALSE")) { // the boolean FALSE itself
+			return false;
+		}
+		double val_double = Double_.parse_or(val, -1); // pick "-1" as marker for invalid doubles; only care about comparing to "0"
+		// the integers 0 and -0 (zero)
+		// the floats 0.0 and -0.0 (zero)
+		// ... and the String "0"
+		if (val_double == 0) {
+			return false;
+		}
+		// Skip these as they shouldn't render in String serialization
+		// * an array with zero elements
+		// * the special type NULL (including unset variables)
+		// * SimpleXML objects created from empty tags
+		return true;
+	}
+}
+
diff --git a/400_xowa/src/gplx/xowa/mediawiki/XophpBool_tst.java b/400_xowa/src/gplx/xowa/mediawiki/XophpBool_tst.java
new file mode 100644
index 000000000..c18a3043e
--- /dev/null
+++ b/400_xowa/src/gplx/xowa/mediawiki/XophpBool_tst.java
@@ -0,0 +1,35 @@
+/*
+XOWA: the XOWA Offline Wiki Application
+Copyright (C) 2012-2017 gnosygnu@gmail.com
+
+XOWA is licensed under the terms of the General Public License (GPL) Version 3,
+or alternatively under the terms of the Apache License Version 2.0.
+
+You may use XOWA according to either of these licenses as is most appropriate
+for your project on a case-by-case basis.
+
+The terms of each license can be found in the source code repository:
+
+GPLv3 License: https://github.com/gnosygnu/xowa/blob/master/LICENSE-GPLv3.txt
+Apache License: https://github.com/gnosygnu/xowa/blob/master/LICENSE-APACHE2.txt
+*/
+package gplx.xowa.mediawiki; import gplx.*; import gplx.xowa.*;
+import org.junit.*; import gplx.core.tests.*;
+public class XophpBool_tst {
+	private final    XophpBool_fxt fxt = new XophpBool_fxt();
+	@Test  public void is_true() {
+		fxt.Test__is_true_bry(Bool_.N, null);
+		fxt.Test__is_true_str(Bool_.N, null, "", "False", "0", "-0", "0.0", "-0.0");
+		fxt.Test__is_true_str(Bool_.Y, "a", "0.1");
+	}
+}
+class XophpBool_fxt {
+	public void Test__is_true_str(boolean expd, String... ary) {
+		for (String itm : ary) {
+			Gftest.Eq__bool(expd, XophpBool.is_true(itm));
+		}
+	}
+	public void Test__is_true_bry(boolean expd, byte[] itm) {
+		Gftest.Eq__bool(expd, XophpBool.is_true(itm));
+	}
+}
diff --git a/400_xowa/src/gplx/xowa/xtns/proofreadPage/Pp_pages_nde.java b/400_xowa/src/gplx/xowa/xtns/proofreadPage/Pp_pages_nde.java
index 24302bee9..8801a41fd 100644
--- a/400_xowa/src/gplx/xowa/xtns/proofreadPage/Pp_pages_nde.java
+++ b/400_xowa/src/gplx/xowa/xtns/proofreadPage/Pp_pages_nde.java
@@ -21,6 +21,7 @@ import gplx.xowa.wikis.nss.*;
 import gplx.xowa.xtns.lst.*; import gplx.xowa.wikis.pages.*; import gplx.xowa.wikis.data.tbls.*;
 import gplx.xowa.parsers.*; import gplx.xowa.parsers.amps.*; import gplx.xowa.parsers.xndes.*; import gplx.xowa.parsers.htmls.*; import gplx.xowa.parsers.lnkis.*; import gplx.xowa.parsers.tmpls.*;
 import gplx.xowa.parsers.lnkis.files.*;
+import gplx.xowa.mediawiki.*;
 public class Pp_pages_nde implements Xox_xnde, Mwh_atr_itm_owner1 {
 	private boolean xtn_literal = false;
 	private Xop_root_tkn xtn_root;
@@ -123,8 +124,9 @@ public class Pp_pages_nde implements Xox_xnde, Mwh_atr_itm_owner1 {
 		else {
 			header = Toc_bry;
 		}
-		if (header != null)
+		if (header != null && XophpBool.is_true(header)) {// check if header is true; ignore values like header=0; ISSUE#:622; DATE:2019-11-28
 			rv = Bld_wikitext_for_header(full_bfr, index_page, rv);
+		}
 		return rv;
 	}	private static final    byte[] Toc_bry = Bry_.new_a7("toc");
 	private byte[] Make_lnki(Bry_bfr full_bfr, byte[] index_page_src, Xop_lnki_tkn lnki) {
diff --git a/400_xowa/src/gplx/xowa/xtns/proofreadPage/Pp_pages_nde_hdr_tst.java b/400_xowa/src/gplx/xowa/xtns/proofreadPage/Pp_pages_nde_hdr_tst.java
index cf0d3f7fc..352d0aaa7 100644
--- a/400_xowa/src/gplx/xowa/xtns/proofreadPage/Pp_pages_nde_hdr_tst.java
+++ b/400_xowa/src/gplx/xowa/xtns/proofreadPage/Pp_pages_nde_hdr_tst.java
@@ -152,4 +152,11 @@ public class Pp_pages_nde_hdr_tst {
 		,	"</p>"
 		));
 	}
+	@Test  public void Header_is_0() {// PURPOSE: if header is PHP false, ignore; ISSUE#:622 DATE:2019-11-28
+		// fails if TOC is included ("value=0")
+		fxt.Test_parse_page_wiki_str("<pages index='A' include=1 header=0/>", String_.Concat_lines_nl
+		(	"<p>&#32;"
+		,	"</p>"
+		));
+	}
 }