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DOMDocument::prepend

(PHP 8)

DOMDocument::prepend — Prepends nodes before the first child node

说明

public DOMDocument::prepend(DOMNode|string ...$nodes): void

Prepends one or many nodes to the list of children before the first child node.

参数

nodes

The nodes to prepend. 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 this node 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 an owner document now works. Previously this threw a DOMException with code DOM_HIERARCHY_REQUEST_ERR.

示例

示例 #1 DOMDocument::prepend() example

Adds nodes before the document root.

<?php
$doc = new DOMDocument;
$doc->loadXML("<world/>");

$doc->prepend($doc->createElement("hello"), "beautiful");

echo $doc->saveXML();
?>

以上示例会输出：

<?xml version="1.0"?>
<hello/>
beautiful
<world/>

参见