diff --git a/reference/spl/outofboundsexception.xml b/reference/spl/outofboundsexception.xml
index 60a8870d32..f9c0885960 100644
--- a/reference/spl/outofboundsexception.xml
+++ b/reference/spl/outofboundsexception.xml
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
 <!-- $Revision$ -->
-<!-- EN-Revision: 14767af0f05dffa6fdb9b49e1a1f4e9ca7022a60 Maintainer: takagi Status: ready -->
+<!-- EN-Revision: 4d17b7b4947e7819ff5036715dd706be87ae4def Maintainer: takagi Status: ready -->
 <!-- Credits: mumumu -->
 <reference xml:id="class.outofboundsexception" role="exception" xmlns="http://docbook.org/ns/docbook" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xi="http://www.w3.org/2001/XInclude">
  <title>OutOfBoundsException クラス</title>
diff --git a/reference/spl/recursivefilteriterator.xml b/reference/spl/recursivefilteriterator.xml
index cc75464e18..ce579fa84c 100644
--- a/reference/spl/recursivefilteriterator.xml
+++ b/reference/spl/recursivefilteriterator.xml
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
 <!-- $Revision$ -->
-<!-- EN-Revision: 14767af0f05dffa6fdb9b49e1a1f4e9ca7022a60 Maintainer: takagi Status: ready -->
+<!-- EN-Revision: 4d17b7b4947e7819ff5036715dd706be87ae4def Maintainer: takagi Status: ready -->
 <reference xml:id="class.recursivefilteriterator" role="class" xmlns="http://docbook.org/ns/docbook" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xi="http://www.w3.org/2001/XInclude">
 
  <title>RecursiveFilterIterator クラス</title>
diff --git a/reference/spl/splfileobject/fwrite.xml b/reference/spl/splfileobject/fwrite.xml
index 74f4164e43..7087afae88 100644
--- a/reference/spl/splfileobject/fwrite.xml
+++ b/reference/spl/splfileobject/fwrite.xml
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
 <!-- $Revision$ -->
-<!-- EN-Revision: 7586ab5177f6c12ec709bf336c16bb2e20553be8 Maintainer: masakielastic Status: ready -->
+<!-- EN-Revision: aa120f36c5762e99f9ee121d8caf910e0a67121e Maintainer: masakielastic Status: ready -->
 <!-- Credits: mumumu -->
 <refentry xml:id="splfileobject.fwrite" xmlns="http://docbook.org/ns/docbook" xmlns:xlink="http://www.w3.org/1999/xlink">
  <refnamediv>
@@ -13,7 +13,7 @@
   <methodsynopsis role="SplFileObject">
    <modifier>public</modifier> <type class="union"><type>int</type><type>false</type></type><methodname>SplFileObject::fwrite</methodname>
    <methodparam><type>string</type><parameter>data</parameter></methodparam>
-   <methodparam choice="opt"><type>int</type><parameter>length</parameter><initializer>0</initializer></methodparam>
+   <methodparam choice="opt"><type class="union"><type>int</type><type>null</type></type><parameter>length</parameter><initializer>&null;</initializer></methodparam>
   </methodsynopsis>
   <para>
    Writes the contents of <parameter>data</parameter> to the file
@@ -36,7 +36,7 @@
      <term><parameter>length</parameter></term>
      <listitem>
       <para>
-       <parameter>length</parameter> 引数が渡される場合、<parameter>length</parameter> バイト分だけ書き込まれた後もしくは <parameter>data</parameter> の終端に達するのどちらか早い方の後で書き込みが停止します。
+       <parameter>length</parameter> 引数が <type>int</type> の場合、<parameter>length</parameter> バイト分だけ書き込まれた後もしくは <parameter>data</parameter> の終端に達するのどちらか早い方の後で書き込みが停止します。
       </para>
      </listitem>
     </varlistentry>
@@ -62,6 +62,12 @@
      </row>
     </thead>
     <tbody>
+     <row>
+      <entry>8.5.0</entry>
+      <entry>
+       <parameter>length</parameter> は nullable になりました。
+      </entry>
+     </row>
      <row>
       <entry>7.4.0</entry>
       <entry>
diff --git a/reference/spl/splpriorityqueue.xml b/reference/spl/splpriorityqueue.xml
index 851474689f..c85c9d36ae 100644
--- a/reference/spl/splpriorityqueue.xml
+++ b/reference/spl/splpriorityqueue.xml
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
 <!-- $Revision$ -->
-<!-- EN-Revision: 14767af0f05dffa6fdb9b49e1a1f4e9ca7022a60 Maintainer: takagi Status: ready -->
+<!-- EN-Revision: 4d17b7b4947e7819ff5036715dd706be87ae4def Maintainer: takagi Status: ready -->
 <!-- Credits: mumumu -->
 <reference xml:id="class.splpriorityqueue" role="class" xmlns="http://docbook.org/ns/docbook" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xi="http://www.w3.org/2001/XInclude">
  <title>SplPriorityQueue クラス</title>