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# DomNode->insert_before

(no version information, might be only in CVS)

DomNode->insert_before -- Inserts new node as child

## Description

object DomNode->insert_before ( object newnode, object refnode)

This function inserts the new node `newnode` right before the node `refnode`. The return value is the inserted node. If you plan to do further modifications on the appended child you must use the returned node.

(PHP >= 4.3 only) If `newnode` already is part of a document, it will be first unlinked from its existing context. If `refnode` is NULL, then `newnode` will be inserted at the end of the list of children.

DomNode_insert_before() is very similar to DomNode_append_child() as the following example shows which does the same as the example at DomNode_append_child().

Example 1. Adding a child

    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>";

See also DomNode_append_child().

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