diff --git a/reference/array/functions/array-filter.xml b/reference/array/functions/array-filter.xml
index 1e66bfbca6..fb3e9bceb0 100644
--- a/reference/array/functions/array-filter.xml
+++ b/reference/array/functions/array-filter.xml
@@ -10,8 +10,8 @@
   &reftitle.description;
   <methodsynopsis>
    <type>array</type><methodname>array_filter</methodname>
-   <methodparam><type>array</type><parameter>array</parameter></methodparam>
-   <methodparam choice="opt"><type>callable</type><parameter>callback</parameter></methodparam>
+   <methodparam><type>array</type><parameter>array</parameter><initializer>array()</initializer></methodparam>
+   <methodparam choice="opt"><type>callable</type><parameter>callback</parameter><initializer>Function()</initializer></methodparam>
   </methodsynopsis>
   <para>
    Iterates over each value in the <parameter>array</parameter>
diff --git a/reference/array/functions/array-keys.xml b/reference/array/functions/array-keys.xml
index 84dcb70f70..cd52b24773 100644
--- a/reference/array/functions/array-keys.xml
+++ b/reference/array/functions/array-keys.xml
@@ -4,14 +4,14 @@
  <refnamediv>
   <refname>array_keys</refname>
   <refpurpose>Return all the keys or a subset of the keys of an array</refpurpose>
- </refnamediv>
+ </refnamediv> 
  
  <refsect1 role="description">
   &reftitle.description;
   <methodsynopsis>
    <type>array</type><methodname>array_keys</methodname>
    <methodparam><type>array</type><parameter>array</parameter></methodparam>
-   <methodparam choice="opt"><type>mixed</type><parameter>search_value</parameter></methodparam>
+   <methodparam choice="opt"><type>mixed</type><parameter>search_value</parameter><initializer>""</initializer></methodparam>
    <methodparam choice="opt"><type>bool</type><parameter>strict</parameter><initializer>false</initializer></methodparam>
   </methodsynopsis>
   <para>
diff --git a/reference/array/functions/array-splice.xml b/reference/array/functions/array-splice.xml
index f03499f983..be317d0668 100644
--- a/reference/array/functions/array-splice.xml
+++ b/reference/array/functions/array-splice.xml
@@ -11,7 +11,7 @@
    <type>array</type><methodname>array_splice</methodname>
    <methodparam><type>array</type><parameter role="reference">input</parameter></methodparam>
    <methodparam><type>int</type><parameter>offset</parameter></methodparam>
-   <methodparam choice="opt"><type>int</type><parameter>length</parameter></methodparam>
+   <methodparam choice="opt"><type>int</type><parameter>length</parameter><initializer>int</initializer></methodparam>
    <methodparam choice="opt"><type>mixed</type><parameter>replacement</parameter><initializer>array()</initializer></methodparam>
   </methodsynopsis>
   <para>