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<title>Replaces a child</title>
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<h1 class="refname">DOMNode::replaceChild</h1>
<p class="verinfo">(PHP 5)</p><p class="refpurpose"><span class="refname">DOMNode::replaceChild</span> — <span class="dc-title">
Replaces a child
</span></p>
</div>
<div class="refsect1 description" id="refsect1-domnode.replacechild-description">
<h3 class="title">Description</h3>
<div class="methodsynopsis dc-description">
<span class="modifier">public</span> <span class="type"><a href="class.domnode.html" class="type DOMNode">DOMNode</a></span> <span class="methodname"><strong>DOMNode::replaceChild</strong></span>
( <span class="methodparam"><span class="type"><a href="class.domnode.html" class="type DOMNode">DOMNode</a></span> <code class="parameter">$newnode</code></span>
, <span class="methodparam"><span class="type"><a href="class.domnode.html" class="type DOMNode">DOMNode</a></span> <code class="parameter">$oldnode</code></span>
)</div>
<p class="para rdfs-comment">
This function replaces the child <em><code class="parameter">oldnode</code></em>
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.
</p>
</div>
<div class="refsect1 parameters" id="refsect1-domnode.replacechild-parameters">
<h3 class="title">Parameters</h3>
<p class="para">
<dl>
<dt>
<span class="term"><em><code class="parameter">newnode</code></em></span>
<dd>
<p class="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 <a href="domdocument.importnode.html" class="xref">DOMDocument::importNode</a>.
</p>
</dd>
</dt>
<dt>
<span class="term"><em><code class="parameter">oldnode</code></em></span>
<dd>
<p class="para">
The old node.
</p>
</dd>
</dt>
</dl>
</p>
</div>
<div class="refsect1 returnvalues" id="refsect1-domnode.replacechild-returnvalues">
<h3 class="title">Return Values</h3>
<p class="para">
The old node or <strong><code>FALSE</code></strong> if an error occur.
</p>
</div>
<div class="refsect1 errors" id="refsect1-domnode.replacechild-errors">
<h3 class="title">Errors/Exceptions</h3>
<p class="para">
<dl>
<dt>
<span class="term"><strong><code>DOM_NO_MODIFICATION_ALLOWED_ERR</code></strong></span>
<dd>
<p class="para">
Raised if this node is readonly or if the previous parent of the node
being inserted is readonly.
</p>
</dd>
</dt>
<dt>
<span class="term"><strong><code>DOM_HIERARCHY_REQUEST_ERR</code></strong></span>
<dd>
<p class="para">
Raised if this node is of a type that does not allow children of the
type of the <em><code class="parameter">newnode</code></em> node, or if the node to
put in is one of this node's ancestors or this node itself.
</p>
</dd>
</dt>
<dt>
<span class="term"><strong><code>DOM_WRONG_DOCUMENT_ERR</code></strong></span>
<dd>
<p class="para">
Raised if <em><code class="parameter">newnode</code></em> was created from a different
document than the one that created this node.
</p>
</dd>
</dt>
<dt>
<span class="term"><strong><code>DOM_NOT_FOUND</code></strong></span>
<dd>
<p class="para">
Raised if <em><code class="parameter">oldnode</code></em> is not a child of this node.
</p>
</dd>
</dt>
</dl>
</p>
</div>
<div class="refsect1 seealso" id="refsect1-domnode.replacechild-seealso">
<h3 class="title">See Also</h3>
<p class="para">
<ul class="simplelist">
<li class="member"> <span class="methodname"><a href="domnode.appendchild.html" class="methodname" rel="rdfs-seeAlso">DOMNode::appendChild()</a> - Adds new child at the end of the children</span></li>
<li class="member"> <span class="methodname"><a href="domnode.removechild.html" class="methodname" rel="rdfs-seeAlso">DOMNode::removeChild()</a> - Removes child from list of children</span></li>
</ul>
</p>
</div>
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