<?xml version="1.0" encoding="iso-8859-1"?>
<!-- $Revision: 1.3 $ -->
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  <refentry id='function.DomNode-insert-before'>
   <refnamediv>
    <refname>DomNode->insert_before</refname>
    <refpurpose>
     Inserts new node as child
    </refpurpose>
   </refnamediv>
   <refsect1>
    <title>Description</title>
    <methodsynopsis>
     <type>object</type><methodname>DomNode->insert_before</methodname>
     <methodparam><type>object</type><parameter>newnode</parameter></methodparam>
     <methodparam><type>object</type><parameter>refnode</parameter></methodparam>
    </methodsynopsis>
    <para>
     This function inserts the new node <parameter>newnode</parameter> right
     before the node <parameter>refnode</parameter>. The return value is the 
     inserted node. If you plan to do further modifications on the appended 
     child you must use the returned node.
    </para>
    <para>
     (PHP &gt;= 4.3 only) If <parameter>newnode</parameter> already is part of a 
     document, it will be first unlinked from its existing context. If 
     <parameter>refnode</parameter> is NULL, then <parameter>newnode</parameter>
     will be inserted at the end of the list of children.  
    </para>
    <para>
     <function>DomNode_insert_before</function> is very similar to
     <function>DomNode_append_child</function> as the following example shows
     which does the same as the example at
     <function>DomNode_append_child</function>.
    </para>
    <para>
     <example>
      <title>Adding a child</title>
      <programlisting role="php">
<![CDATA[
include("example.inc");

if(!$dom = domxml_open_mem($xmlstr)) {
  echo "Error while parsing the document\n";
  exit;
}

$elements = $dom->get_elements_by_tagname("informaltable");
print_r($elements);
$element = $elements[0];

$newnode = $element->insert_before($element, $element);
$children = $newnode->children();
$attr = $children[1]->set_attribute("align", "left");

echo "<PRE>";
$xmlfile = $dom->dump_mem();
echo htmlentities($xmlfile);
echo "</PRE>";
]]>
      </programlisting>
     </example>
    </para>
    <para>
     See also <function>DomNode_append_child</function>.
    </para>
   </refsect1>
  </refentry>

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