PHP使用DOM和simplexml读取xml文档的方法示例

<?xml version="1.0" encoding="utf-8"?>
<root>
 <book>
  <title>天龙八部</title>
  <author>金庸</author>
 </book>
 <book>
  <title>陆小凤</title>
  <author>古龙</author>
 </book>
 <book>
  <title>倚天屠龙记</title>
  <author>金庸</author>
 </book>
 <book>
  <title>西游记</title>
  <author>吴承恩</author>
 </book>
 <book>
  <title>神雕侠侣</title>
  <author>金庸</author>
 </book>
 <book>
  <title>射雕英雄传</title>
  <author>金庸</author>
 </book>
</root>

header('Content-type:text/html;charset=utf-8');
$arr=array();
$dom = new DOMDocument();//创建DOM对象
$dom->load('./books.xml');//载入xml文档
print_r($dom);
echo '<hr>';
$dom = $dom->getElementsByTagName('book');//截取标签
for($i=0;$i<$dom->length;$i++){
 if($dom->item($i)->childNodes->item(1)->childNodes->item(0)->wholeText=='金庸'){
  $arr[] = $dom->item($i)->childNodes->item(0)->childNodes->item(0)->wholeText.'<br />';//获取内容
 }
}
print_r($arr);

$simxml = simplexml_load_file('./books.xml');
$t = $simxml->book;
$arr=array();
foreach ($t as $v){
 if($v->author=='金庸'){
  $arr[] = (string)$v->title;
 }
}
print_r($arr);