1. <?php 
2.  $books=array(); 
3.  $books[] =array( 
4.  'title'=>'PHP Hacks', 
5.  'author'=>'Jack Herrington', 
6.  'publisher'=>"O'Reilly" 
7.  ); 
8.  $books[] =array( 
9.  'title'=>'Podcasting Hacks', 
10.  'author'=>'Jack Herrington', 
11.  'publisher'=>"O'Reilly" 
12.  ); 
13.  $doc=newDOMDocument(); 
14.  $doc->formatOutput = true; 
15.  $r=$doc->createElement("books"); 
16.  $doc->appendChild($r); 
17.  foreach($booksas$book) 
18.  { 
19.  $b=$doc->createElement("book"); 
20.  $author=$doc->createElement("author"); 
21.  $author->appendChild( 
22.  $doc->createTextNode($book['author'] ) 
23.  ); 
24.  $b->appendChild($author); 
25.  $title=$doc->createElement("title"); 
26.  $title->appendChild( 
27.  $doc->createTextNode($book['title'] ) 
28.  ); 
29.  $b->appendChild($title); 
30.  $publisher=$doc->createElement("publisher"); 
31.  $publisher->appendChild( 
32.  $doc->createTextNode($book['publisher'] ) 
33.  ); 
34.  $b->appendChild($publisher); 
35.  $r->appendChild($b); 
36.  } 
37.  echo$doc->saveXML(); 
38. ?> 

运行结果如下：

1. <?xmlversionxmlversion="1.0"?> 
2. <books> 
3.  <book> 
4.   <author>Jack Herrington</author> 
5.   <title>PHP Hacks</title> 
6.   <publisher>O'Reilly</publisher> 
7.  </book> 
8.  <book> 
9.   <author>Jack Herrington</author> 
10.   <title>Podcasting Hacks</title> 
11.   <publisher>O'Reilly</publisher> 
12.  </book> 
13. </books>