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# PHP children() 函数 ## 定义和用法 children() 函数获取指定节点的子节点。 ### 语法 ``` class SimpleXMLElement { string children(ns,is_prefix) } ``` | 参数 | 描述 | | --- | --- | | ns | 可选。 | | is_prefix | 可选。默认是 false。 | ## 例子 XML 文件: ``` <?xml version="1.0" encoding="ISO-8859-1"?> <note> <to>George</to> <from>John</from> <heading>Reminder</heading> <body>Don't forget the meeting!</body> </note> ``` PHP 代码: ``` <?php $xml = simplexml_load_file("test.xml"); foreach ($xml->children() as $child) { echo "Child node: " . $child; } ?> ``` 输出类似: ``` Child node: George Child node: John Child node: Reminder Child node: Don't forget the meeting! ```