diff --git a/language/oop5/interfaces.xml b/language/oop5/interfaces.xml
index d4757e4466..9d18f06729 100644
--- a/language/oop5/interfaces.xml
+++ b/language/oop5/interfaces.xml
@@ -212,9 +212,8 @@ class b implements a
    <para>
      An interface, together with type-hinting, provides a good way to make sure
      that a particular object contains particular methods. See
-     <link linkend="language.operators.type">instanceof</link> and
+     <link linkend="language.operators.type">instanceof</link> operator and
      <link linkend="language.oop5.typehinting">type hinting</link>.
-     operator.
    </para>
   </sect2>
 
diff --git a/reference/mysql/functions/mysql-insert-id.xml b/reference/mysql/functions/mysql-insert-id.xml
index eefc4d73c7..6bd194ed7f 100644
--- a/reference/mysql/functions/mysql-insert-id.xml
+++ b/reference/mysql/functions/mysql-insert-id.xml
@@ -64,14 +64,14 @@ printf("Last inserted record has id %d\n", mysql_insert_id());
   &reftitle.notes;
   <caution>
    <para>
-    <function>mysql_insert_id</function> converts the return type of
-    the native MySQL C API function
-    <literal>mysql_insert_id()</literal> to a type of
-    <literal>long</literal> (named <type>int</type> in PHP).
-    If your AUTO_INCREMENT column has a column type of BIGINT,
-    the value returned by <function>mysql_insert_id</function>
-    will be incorrect. Instead, use the internal MySQL SQL function
-    <literal>LAST_INSERT_ID()</literal> in an SQL query.
+    <function>mysql_insert_id</function> will convert the return type of the
+    native MySQL C API function <literal>mysql_insert_id()</literal> to a type
+    of <literal>long</literal> (named <type>int</type> in PHP). If your
+    AUTO_INCREMENT column has a column type of BIGINT (64 bits) the
+    conversion may result in an incorrect value. Instead, use the internal
+    MySQL SQL function LAST_INSERT_ID() in an SQL query. For more information
+    about PHP's maximum integer values, please see the
+    <link linkend="language.types.integer">integer</link> documentation.
    </para>
   </caution>
   <note>