如何获取 SimpleXmlElement 属性的值？

Question

我有这个 XML 代码：<w:footerReference w:type="default" r:id="rId6"/>在 PHP 我有这个代码：// $footer is a SimpleXMLElement, contain the code aboveforeach ($footer->attributes() as $attr_name => $attr_value) {    dd($attr_name." = ".$attr_value);}并且foreach没有运行。我也试过这个：$type = 'type';$footer->attributes()->$type; // empty string$wtype = 'w:type';$footer->attributes()->$wtype; // empty string当然，我可以将 XML 转换为字符串并执行一些正则表达式魔术，但在我看来这不是一个好方法。更新：这是整个 XML 文档代码：<?xml version="1.0" encoding="UTF-8" standalone="yes"?><w:document xmlns:wpc="http://schemas.microsoft.com/office/word/2010/wordprocessingCanvas"     xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"     xmlns:o="urn:schemas-microsoft-com:office:office"     xmlns:r="http://schemas.openxmlformats.org/officeDocument/2006/relationships"     xmlns:m="http://schemas.openxmlformats.org/officeDocument/2006/math"     xmlns:v="urn:schemas-microsoft-com:vml"     xmlns:wp14="http://schemas.microsoft.com/office/word/2010/wordprocessingDrawing"     xmlns:wp="http://schemas.openxmlformats.org/drawingml/2006/wordprocessingDrawing"     xmlns:w10="urn:schemas-microsoft-com:office:word"     xmlns:w="http://schemas.openxmlformats.org/wordprocessingml/2006/main"     xmlns:w14="http://schemas.microsoft.com/office/word/2010/wordml"     xmlns:w15="http://schemas.microsoft.com/office/word/2012/wordml"     xmlns:wpg="http://schemas.microsoft.com/office/word/2010/wordprocessingGroup"     xmlns:wpi="http://schemas.microsoft.com/office/word/2010/wordprocessingInk"     xmlns:wne="http://schemas.microsoft.com/office/word/2006/wordml"     xmlns:wps="http://schemas.microsoft.com/office/word/2010/wordprocessingShape" mc:Ignorable="w14 w15 wp14">    <w:body>        <w:sectPr w:rsidR="00654EDA">            <w:footerReference w:type="default" r:id="rId6"/>        </w:sectPr>    </w:body></w:document>如何访问w:type和r:id属性值？

Answer 1

您必须将属性命名空间作为参数传递 attributes

$type = $footer->attributes("http://schemas.openxmlformats.org/wordprocessingml/2006/main")->type;

$id = $footer->attributes("http://schemas.openxmlformats.org/officeDocument/2006/relationships")->id;

与 foreach 相同

foreach ($footer->attributes("http://schemas.openxmlformats.org/wordprocessingml/2006/main") as $attr_name => $attr_value) {

    dd($attr_name." = ".$attr_value);

}

foreach ($footer->attributes("http://schemas.openxmlformats.org/officeDocument/2006/relationships") as $attr_name => $attr_value) {

    dd($attr_name." = ".$attr_value);

}