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<?xml version="1.0" encoding="iso-8859-1"?>
<!-- $Revision: 1.11 $ -->
<refentry id='function.dom-domnode-replacechild'>
<refnamediv>
<refname>DOMNode->replaceChild()</refname>
<refpurpose>
Replaces a child
</refpurpose>
</refnamediv>
<refsect1 role="description">
&reftitle.description;
<classsynopsis>
<ooclass><classname>DOMNode</classname></ooclass>
<methodsynopsis>
<type>DOMNode</type><methodname>replaceChild</methodname>
<methodparam><type>DOMNode</type><parameter>newnode</parameter></methodparam>
<methodparam><type>DOMNode</type><parameter>oldnode</parameter></methodparam>
</methodsynopsis>
</classsynopsis>
<para>
This function replaces the child <parameter>oldnode</parameter>
with the passed new node. If the new node is already a child it
will not be added a second time. If the replacement succeeds the
old node is returned.
</para>
</refsect1>
<refsect1 role="parameters">
&reftitle.parameters;
<para>
<variablelist>
<varlistentry>
<term><parameter>newnode</parameter></term>
<listitem>
<para>
The new node. It must be a member of the target document, i.e.
created by one of the DOMDocument->createXXX() methods or imported in
the document by <xref linkend='function.dom-domdocument-importnode' />.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><parameter>oldnode</parameter></term>
<listitem>
<para>
The old node.
</para>
</listitem>
</varlistentry>
</variablelist>
</para>
</refsect1>
<refsect1 role="returnvalues">
&reftitle.returnvalues;
<para>
The old node or &false; if an error occur.
</para>
</refsect1>
<refsect1 role="errors">
&reftitle.errors;
<para>
<variablelist>
<varlistentry>
<term><constant>DOM_NO_MODIFICATION_ALLOWED_ERR</constant></term>
<listitem>
<para>
Raised if this node is readonly or if the previous parent of the node
being inserted is readonly.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><constant>DOM_HIERARCHY_REQUEST_ERR</constant></term>
<listitem>
<para>
Raised if this node is of a type that does not allow children of the
type of the <parameter>newnode</parameter> node, or if the node to
put in is one of this node's ancestors or this node itself.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><constant>DOM_WRONG_DOCUMENT_ERR</constant></term>
<listitem>
<para>
Raised if <parameter>newnode</parameter> was created from a different
document than the one that created this node.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><constant>DOM_NOT_FOUND</constant></term>
<listitem>
<para>
Raised if <parameter>oldnode</parameter> is not a child of this node.
</para>
</listitem>
</varlistentry>
</variablelist>
</para>
</refsect1>
<refsect1 role="seealso">
&reftitle.seealso;
<para>
<simplelist>
<member><xref linkend="function.dom-domnode-appendchild" /></member>
<member><xref linkend="function.dom-domnode-removechild" /></member>
</simplelist>
</para>
</refsect1>
</refentry>
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