(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_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 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/>