(PHP 8)
DOMElement::before — Adds nodes before the element
Adds the passed nodes before the element.
nodesNodes to be added before the node. Strings are automatically converted to text nodes.
没有返回值。
DOM_HIERARCHY_REQUEST_ERRnodes, or if the node to
put in is one of this node's ancestors or this node itself.
DOM_WRONG_DOCUMENT_ERRnodes 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 DOMElement::before() example
Adds nodes before the hello element.
<?php
$doc = new DOMDocument;
$doc->loadXML("<world/>");
$world = $doc->documentElement;
$world->before("hello", $doc->createElement("beautiful"));
echo $doc->saveXML();
?>以上示例会输出：
hello <beautiful/> <world/>