diff --git a/appendices/comparisons.xml b/appendices/comparisons.xml
index 5a493ce3c6..985c528bde 100644
--- a/appendices/comparisons.xml
+++ b/appendices/comparisons.xml
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="iso-8859-1"?>
-<!-- $Revision: 1.9 $ -->
+<!-- $Revision: 1.10 $ -->
 <appendix id="types.comparisons">
  <title>PHP type comparison tables</title>
  <para>
@@ -208,6 +208,7 @@
       <entry>&null;</entry>
       <entry><literal>array()</literal></entry>
       <entry><literal>"php"</literal></entry>
+      <entry><literal>""</literal></entry>
      </row>
     </thead>
     <tbody>
@@ -224,6 +225,7 @@
       <entry>&false;</entry>
       <entry>&false;</entry>
       <entry>&true;</entry>
+      <entry>&false;</entry>
      </row>
      <row>
       <entry>&false;</entry>
@@ -238,6 +240,7 @@
       <entry>&true;</entry>
       <entry>&true;</entry>
       <entry>&false;</entry>
+      <entry>&true;</entry>
      </row>
      <row>
       <entry><literal>1</literal></entry>
@@ -252,6 +255,7 @@
       <entry>&false;</entry>
       <entry>&false;</entry>
       <entry>&false;</entry>
+      <entry>&false;</entry>
      </row>
      <row>
       <entry><literal>0</literal></entry>
@@ -266,6 +270,7 @@
       <entry>&true;</entry>
       <entry>&false;</entry>
       <entry>&true;</entry>
+      <entry>&true;</entry>
      </row>
      <row>
       <entry><literal>-1</literal></entry>
@@ -280,6 +285,7 @@
       <entry>&false;</entry>
       <entry>&false;</entry>
       <entry>&false;</entry>
+      <entry>&false;</entry>
      </row>
      <row>
       <entry><literal>"1"</literal></entry>
@@ -294,6 +300,7 @@
       <entry>&false;</entry>
       <entry>&false;</entry>
       <entry>&false;</entry>
+      <entry>&false;</entry>
      </row>
      <row>
       <entry><literal>"0"</literal></entry>
@@ -308,6 +315,7 @@
       <entry>&false;</entry>
       <entry>&false;</entry>
       <entry>&false;</entry>
+      <entry>&false;</entry>
      </row>
      <row>
       <entry><literal>"-1"</literal></entry>
@@ -322,6 +330,7 @@
       <entry>&false;</entry>
       <entry>&false;</entry>
       <entry>&false;</entry>
+      <entry>&false;</entry>
      </row>
      <row>
       <entry><literal>NULL</literal></entry>
@@ -336,6 +345,7 @@
       <entry>&true;</entry>
       <entry>&true;</entry>
       <entry>&false;</entry>
+      <entry>&false;</entry>
      </row>
      <row>
       <entry><literal>array()</literal></entry>
@@ -350,6 +360,7 @@
       <entry>&true;</entry>
       <entry>&true;</entry>
       <entry>&false;</entry>
+      <entry>&false;</entry>
      </row>
      <row>
       <entry><literal>"php"</literal></entry>
@@ -364,6 +375,22 @@
       <entry>&false;</entry>
       <entry>&false;</entry>
       <entry>&true;</entry>
+      <entry>&false;</entry>
+     </row>
+     <row>
+      <entry><literal>""</literal></entry>
+      <entry>&false;</entry>
+      <entry>&true;</entry>
+      <entry>&false;</entry>
+      <entry>&true;</entry>
+      <entry>&false;</entry>
+      <entry>&false;</entry>
+      <entry>&false;</entry>
+      <entry>&false;</entry>
+      <entry>&false;</entry>
+      <entry>&false;</entry>
+      <entry>&false;</entry>
+      <entry>&true;</entry>
      </row>
     </tbody>
    </tgroup>
@@ -388,6 +415,7 @@
       <entry>&null;</entry>
       <entry><literal>array()</literal></entry>
       <entry><literal>"php"</literal></entry>
+      <entry><literal>""</literal></entry>
      </row>
     </thead>
     <tbody>
@@ -404,6 +432,7 @@
       <entry>&false;</entry>
       <entry>&false;</entry>
       <entry>&false;</entry>
+      <entry>&false;</entry>
      </row>
      <row>
       <entry>&false;</entry>
@@ -418,6 +447,7 @@
       <entry>&false;</entry>
       <entry>&false;</entry>
       <entry>&false;</entry>
+      <entry>&false;</entry>
      </row>
      <row>
       <entry><literal>1</literal></entry>
@@ -432,6 +462,7 @@
       <entry>&false;</entry>
       <entry>&false;</entry>
       <entry>&false;</entry>
+      <entry>&false;</entry>
      </row>
      <row>
       <entry><literal>0</literal></entry>
@@ -446,6 +477,7 @@
       <entry>&false;</entry>
       <entry>&false;</entry>
       <entry>&false;</entry>
+      <entry>&false;</entry>
      </row>
      <row>
       <entry><literal>-1</literal></entry>
@@ -460,6 +492,7 @@
       <entry>&false;</entry>
       <entry>&false;</entry>
       <entry>&false;</entry>
+      <entry>&false;</entry>
      </row>
      <row>
       <entry><literal>"1"</literal></entry>
@@ -474,6 +507,7 @@
       <entry>&false;</entry>
       <entry>&false;</entry>
       <entry>&false;</entry>
+      <entry>&false;</entry>
      </row>
      <row>
       <entry><literal>"0"</literal></entry>
@@ -488,6 +522,7 @@
       <entry>&false;</entry>
       <entry>&false;</entry>
       <entry>&false;</entry>
+      <entry>&false;</entry>
      </row>
      <row>
       <entry><literal>"-1"</literal></entry>
@@ -502,6 +537,7 @@
       <entry>&false;</entry>
       <entry>&false;</entry>
       <entry>&false;</entry>
+      <entry>&false;</entry>
      </row>
      <row>
       <entry>&null;</entry>
@@ -516,6 +552,7 @@
       <entry>&true;</entry>
       <entry>&false;</entry>
       <entry>&false;</entry>
+      <entry>&false;</entry>
      </row>
      <row>
       <entry><literal>array()</literal></entry>
@@ -530,6 +567,7 @@
       <entry>&false;</entry>
       <entry>&true;</entry>
       <entry>&false;</entry>
+      <entry>&false;</entry>
      </row>
      <row>
       <entry><literal>"php"</literal></entry>
@@ -544,6 +582,22 @@
       <entry>&false;</entry>
       <entry>&false;</entry>
       <entry>&true;</entry>
+      <entry>&false;</entry>
+     </row>
+     <row>
+      <entry><literal>""</literal></entry>
+      <entry>&false;</entry>
+      <entry>&false;</entry>
+      <entry>&false;</entry>
+      <entry>&false;</entry>
+      <entry>&false;</entry>
+      <entry>&false;</entry>
+      <entry>&false;</entry>
+      <entry>&false;</entry>
+      <entry>&false;</entry>
+      <entry>&false;</entry>
+      <entry>&false;</entry>
+      <entry>&true;</entry>
      </row>
     </tbody>
    </tgroup>