DOMElement::before

(PHP 8)

DOMElement::before — Adds nodes before the element

说明

public DOMElement::before(DOMNode|string ...$nodes): void

Adds the passed nodes before the element.

参数

nodes: Nodes to be added before the node. Strings are automatically converted to text nodes.

返回值

没有返回值。

错误／异常

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.

更新日志

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

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/>

参见

DOMChildNode::before() - Adds nodes before the node
DOMElement::after() - Adds nodes after the element

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DOMElement::before

说明

参数

返回值

错误／异常

更新日志

示例

参见

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