XML - GET ATTRIBUTE VALUE

books.xml
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<?xml version="1.0" encoding="utf-8"?>
<bookstore>
  <book category="COOKING">
    <title lang="en">Everyday Italian</title>
    <author>Giada De Laurentiis</author>
    <year>2005</year>
    <price>30.00</price>
  </book>
  <book category="CHILDREN">
    <title lang="en">Harry Potter</title>
    <author>J K. Rowling</author>
    <year>2005</year>
    <price>29.99</price>
  </book>
  <book category="WEB">
    <title lang="en-us">XQuery Kick Start</title>
    <author>James McGovern</author>
    <year>2003</year>
    <price>49.99</price>
  </book>
  <book category="WEB">
    <title lang="en-us">Learning XML</title>
    <author>Erik T. Ray</author>
    <year>2003</year>
    <price>39.95</price>
  </book>
</bookstore>************************************************************************

XmlGetAttributeValue.php
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<?php

$xml=simplexml_load_file("books.xml") or die("Error: Cannot create object");

echo $xml->book[0]['category'] . "<br>";

echo $xml->book[1]->title['lang']; 

?>

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OUTPUT
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COOKING

en
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