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class SimpleXMLElement
{
string asXML(file)
}
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file ¿ÉÑ¡¡£Èç¹û¹æ¶¨Á˴˲ÎÊý£¬Ôò¸Ãº¯Êý»á°Ñ XML дÈëÒ»¸öÎļþ£¬¶ø²»ÊÇ·µ»ØËü¡£

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<?xml version="1.0" encoding="ISO-8859-1"?>
<note>
<to>George</to>
<from>John</from>
<heading>Reminder</heading>
<body>Don't forget the meeting!</body>
</note>

PHP ´úÂ룺

<?php
if (file_exists('test.xml'))
  {
  $xml = simplexml_load_file('test.xml');
  }

echo $xml->asXML();
?>

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George John Reminder Don't forget the meeting!

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<note>
<to>George</to>
<from>John</from>
<heading>Reminder</heading>
<body>Don't forget the meeting!</body>
</note>
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