<?php header("Content-type: text/xml"); echo "<?xml version=/"1.0/" encoding=/"UTF-8/"?>"; echo "<users>"; echo "<user>";    echo "<name>";     echo "小小菜鸟";    echo "</name>";    echo "<age>";     echo "24";    echo "</age>";    echo "<sex>";     echo "男";    echo "</sex>"; echo "</user>"; echo "<user>";    echo "<name>";     echo "艳艳";    echo "</name>";    echo "<age>";     echo "23";    echo "</age>";    echo "<sex>";     echo "女";    echo "</sex>"; echo "</user>"; echo "</users>"; ?>

<?php header("Content-type: text/xml"); echo "<?xml version=/"1.0/" encoding=/"UTF-8/"?>"; echo "<users><user><name>小小菜鸟</name><age>24</age><sex>男</sex></user><user><name>艳艳</name><age>23</age><sex>女</sex></user></users>"; ?>

<?php /* 用PHP的DOM控件来创建XML输出 设置输出内容的类型为xml */ header('Content-Type: text/xml;'); //创建新的xml文件 $dom = new DOMDocument('1.0', 'utf-8'); //建立<response>元素 $response = $dom->createElement('response'); $dom->appendChild($response); //建立<books>元素并将其作为<response>的子元素 $books = $dom->createElement('books'); $response->appendChild($books); //为book创建标题 $title = $dom->createElement('title'); $titleText = $dom->createTextNode('PHP与AJAX'); $title->appendChild($titleText); //为book创建isbn元素 $isbn = $dom->createElement('isbn'); $isbnText = $dom->createTextNode('1-21258986'); $isbn->appendChild($isbnText); //创建book元素 $book = $dom->createElement('book'); $book->appendChild($title); $book->appendChild($isbn); //将<book>作为<books>子元素 $books->appendChild($book); //在一字符串变量中建立XML结构 $xmlString = $dom->saveXML(); //输出XML字符串 echo $xmlString; ?>