Start with XML - fetch and display the xml datas using php

books.xml :   
<?xml version="1.0"?>
<datas>
  <books>
    <book>

      <id>1</id>
      <title>PHP Undercover</title>  
      <author>Arun</author>
    </book>
    <book>
      <id>2</id>
      <title>PHP Enterprise</title>   
      <author>Vibin</author>
    </book>
  </books>
</datas>

xmlread.php :
<?php

$xml = simplexml_load_file("books.xml")
       or die("Error: Cannot create object");        //include the books.xml file
foreach($xml as $books)                                       // seperate variables, books array from xml file
{
 foreach($books as $book )                           // seperate variables, book array from books file
      {
   echo $book->id;                                        //display the id
   echo "<br />";
   echo $book->title;                                     //display the title
   echo "<br />";
   echo $book->author;                                //display the author
   echo "<br />";
 }

}
?>

Output:
1
PHP Undercover
Arun
2
PHP Enterprise
Vibin

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Structure of xml

Input XML FILE:
<?xml version="1.0"?>
<note>
    <to cat="head">
        <cc>Arun</cc>
        <cc>Vibin</cc>
    </to>
    <from>
        <bc>Jani</bc>
        <bc>ishya</bc>
    </from>    
</note>

EXPLAIN:
<note>------->parent Element
<to>,<from>-->Child Element
<cc>,<bc>----->siblings
cat----------->attribute

Strcture Tree Diagram: