diff --git a/functions/var.xml b/functions/var.xml
index 4479b6e5f5..63d89caa9e 100644
--- a/functions/var.xml
+++ b/functions/var.xml
@@ -216,27 +216,38 @@ if (!isset($var)) { // evaluates false
   </refentry>
   
   <refentry id="function.is-bool">
-    <refnamediv>
-      <refname>is_bool</refname>
-      <refpurpose>
-        Finds out whether a variable is a boolean
-      </refpurpose>
+   <refnamediv>
+    <refname>is_bool</refname>
+     <refpurpose>
+      Finds out whether a variable is a boolean
+     </refpurpose>
     </refnamediv>
     <refsect1>
-      <title>Description</title>
-      <funcsynopsis>
-        <funcdef>int 
-          <function>is_bool</function>
-        </funcdef>
-        <paramdef>mixed 
-          <parameter>var</parameter>
-        </paramdef>
-      </funcsynopsis>
-      <para>
-        Returns true if the <parameter>var</parameter> parameter is 
-        a boolean.
-      </para>
-    </refsect1>
+     <title>Description</title>
+     <funcsynopsis>
+      <funcdef>int 
+       <function>is_bool</function>
+      </funcdef>
+      <paramdef>mixed 
+       <parameter>var</parameter>
+      </paramdef>
+     </funcsynopsis>
+     <para>
+      Returns true if the <parameter>var</parameter> parameter is 
+      a boolean.
+     </para>
+     <para>
+     See also <function>is_array</function>,
+     <function>is_double</function>,
+     <function>is_float</function>,
+     <function>is_int</function>,
+     <function>is_integer</function>,
+     <function>is_real</function>,
+     <function>is_string</function>,
+     <function>is_long</function>, and
+     <function>is_object</function>.
+    </para>
+   </refsect1>
   </refentry>
 
   <refentry id="function.is-double">
@@ -256,6 +267,7 @@ if (!isset($var)) { // evaluates false
     </para>
     <para>
      See also <function>is_array</function>,
+     <function>is_bool</function>,
      <function>is_float</function>,
      <function>is_int</function>,
      <function>is_integer</function>,
@@ -283,6 +295,7 @@ if (!isset($var)) { // evaluates false
     </simpara>
     <simpara>
      See also <function>is_double</function>,
+     <function>is_bool</function>,
      <function>is_real</function>,
      <function>is_int</function>,
      <function>is_integer</function>,
@@ -309,7 +322,8 @@ if (!isset($var)) { // evaluates false
      This function is an alias for <function>is_long</function>.
     </simpara>
     <simpara>
-     See also <function>is_double</function>,
+     See also <function>is_bool</function>,
+		 <function>is_double</function>,
      <function>is_float</function>,
      <function>is_integer</function>,
      <function>is_string</function>,
@@ -337,7 +351,8 @@ if (!isset($var)) { // evaluates false
      <function>is_long</function>.
     </simpara>
     <simpara>
-     See also <function>is_double</function>,
+     See also <function>is_bool</function>,
+     <function>is_double</function>,
      <function>is_float</function>,
      <function>is_int</function>,
      <function>is_string</function>,
@@ -365,7 +380,8 @@ if (!isset($var)) { // evaluates false
      false otherwise.
     </para>
     <para>
-     See also <function>is_double</function>,
+     See also <function>is_bool</function>,
+     <function>is_double</function>,
      <function>is_float</function>,
      <function>is_int</function>,
      <function>is_real</function>,
@@ -393,7 +409,8 @@ if (!isset($var)) { // evaluates false
      numeric string, false otherwise.
     </para>
     <para>
-     See also <function>is_double</function>,
+     See also <function>is_bool</function>,
+     <function>is_double</function>,
      <function>is_float</function>,
      <function>is_int</function>,
      <function>is_real</function>,
@@ -421,7 +438,8 @@ if (!isset($var)) { // evaluates false
      otherwise.
     </para>
     <para>
-     See also <function>is_long</function>,
+     See also <function>is_bool</function>,
+     <function>is_long</function>,
      <function>is_int</function>,
      <function>is_integer</function>,
      <function>is_float</function>,
@@ -448,7 +466,8 @@ if (!isset($var)) { // evaluates false
      This function is an alias for <function>is_double</function>.
     </simpara>
     <simpara>
-     See also <function>is_long</function>,
+     See also <function>is_bool</function>,
+     <function>is_long</function>,
      <function>is_int</function>,
      <function>is_integer</function>,
      <function>is_float</function>,
@@ -461,28 +480,34 @@ if (!isset($var)) { // evaluates false
   </refentry>
   
   <refentry id="function.is-resource">
-    <refnamediv>
-      <refname>is_resource</refname>
-      <refpurpose>
-        Finds whether a variable is a resource
-      </refpurpose>
-    </refnamediv>
-    <refsect1>
-      <title>Description</title>
-      <funcsynopsis>
-        <funcdef>int 
-          <function>is_resource</function>
-        </funcdef>
-        <paramdef>mixed 
-          <parameter>var</parameter>
-        </paramdef>
-      </funcsynopsis>
-      <para>
-        The <function>is_resource</function> returns true if the variable
-        given by the <parameter>var</parameter> parameter is a resource, otherwise
-        it returns false.
-      </para>
-    </refsect1>
+   <refnamediv>
+    <refname>is_resource</refname>
+    <refpurpose>
+     Finds whether a variable is a resource
+    </refpurpose>
+   </refnamediv>
+   <refsect1>
+    <title>Description</title>
+    <funcsynopsis>
+     <funcdef>int 
+      <function>is_resource</function>
+     </funcdef>
+     <paramdef>mixed 
+      <parameter>var</parameter>
+     </paramdef>
+    </funcsynopsis>
+    <para>
+     <function>is_resource</function> returns true if the variable
+     given by the <parameter>var</parameter> parameter is a resource, 
+     otherwise it returns false.
+    </para>
+    <para>
+     Resources are things like file or database result handles that
+     are allocated and freed by internal PHP functions and that may
+     need some cleanup when they are no longer in use but haven't been
+     freed by user code.  
+    </para>
+   </refsect1>
   </refentry>
 
   <refentry id="function.is-string">
@@ -501,7 +526,8 @@ if (!isset($var)) { // evaluates false
      false otherwise.
     </para>
     <para>
-     See also <function>is_long</function>,
+     See also <function>is_bool</function>,
+     <function>is_long</function>,
      <function>is_int</function>,
      <function>is_integer</function>,
      <function>is_float</function>,
@@ -513,30 +539,6 @@ if (!isset($var)) { // evaluates false
    </refsect1>
   </refentry>
   
-  <refentry id="function.is-writable">
-    <refnamediv>
-      <refname>is_writable</refname>
-      <refpurpose>
-        Finds out whether or not you can write to a file
-      </refpurpose>
-    </refnamediv>
-    <refsect1>
-      <title>Description</title>
-      <funcsynopsis>
-        <funcdef>int 
-          <function>is_writable</function>
-        </funcdef>
-        <paramdef>mixed 
-          <parameter>filename</parameter>
-        </paramdef>
-      </funcsynopsis>
-      <para>
-        The <function>is_writable</function> function returns true if the file pointed
-        to by the <parameter>filename</parameter> parameter can be written to.
-      </para>
-    </refsect1>
-  </refentry>
-
   <refentry id="function.isset">
    <refnamediv>
     <refname>isset</refname>