(PHP 8)
DOMCharacterData::before — Adds nodes before the node
Adds the passed nodes
before the node.
nodes
Nodes to be added before the node. Strings are automatically converted to text nodes.
没有返回值。
DOM_HIERARCHY_REQUEST_ERR
Raised if the parent is of a type that does not allow children of the
type of one of the passed nodes
, or if the node to
put in is one of this node's ancestors or this node itself.
DOM_WRONG_DOCUMENT_ERR
Raised if one of the passed nodes
was created from a different
document than the one that created this node.
版本 | 说明 |
---|---|
8.3.0 |
Calling this method on a node without a parent is now a no-op to align the behaviour with the DOM specification.
Previously this threw a
DOMException with code
DOM_HIERARCHY_REQUEST_ERR .
|
示例 #1 DOMCharacterData::before() example
Adds nodes before the character data.
<?php
$doc = new DOMDocument;
$doc->loadXML("<container><![CDATA[world]]></container>");
$cdata = $doc->documentElement->firstChild;
$cdata->before("hello", $doc->createElement("beautiful"));
echo $doc->saveXML();
?>
以上示例会输出:
<?xml version="1.0"?> <container>hello<beautiful/><![CDATA[world]]></container>