php - 将数组保存为 xml

Question

array(
name => text,
surname => text,
country => text,
date => text
)

1) 如何将此数组保存为 xml 文件？

2) 如何读取这个文件然后作为数组？

Answer 1

// save
$doc = new DOMDocument('1.0');
$doc->formatOutput = true;
$root = $doc->createElement('root');
$root = $doc->appendChild($root);
foreach($arr as $key=>$value)
{
   $em = $doc->createElement($key);       
   $text = $doc->createTextNode($value);
   $em->appendChild($text);
   $root->appendChild($em);

}
$doc->save('file.xml');
// load
 $arr = array();
 $doc = new DOMDocument();
 $doc->load('file.xml');
 $root = $doc->getElementsByTagName('root')->items[0];
 foreach($root->childNodes as $item) 
 { 
   $arr[$item->nodeName] = $item->nodeValue;
 }