how do i display text as xml in php?

[paschim]

How do i output the following as it is?

 

<?php

$output="";

$output='<Books>'."\n";
$output.='<Book ISBN=123456>'."\n";
$output.='<Title>Kulu Manali</Title>'."\n";
$output.="<Author>Me Me</Author>\n";
$output.="</Book>\n";
$output.="<Book ISBN=542631>\n";
$output.="<Title>Ghost Buster</Title>\n";
$output.="<Author>Unknown</Author>\n";
$output.="</Book>\n";
$output.="<Book ISBN=654312>\n";
$output.="<Title>Inu Yasha</Title>\n";
$output.="<Author>My Favourite</Author>\n";
$output.="</Book>\n";
$output.="</Books>";

echo "$output";
?>

 

This echoes:

Me Me Unknown My Favourite 

 

But i need to output the text in xml format so that i can recieve it in flash as xml! Any help?

[JonnoTheDev]

echo "<xmp>".$output."</xmp>";

 

[paschim]

thank you very much for the fast and accurate response