web service Restful or SOAP

I'm developing a mobile application on eclipse, I need a web service to make connection between two heterogeneous computer systems (client and server) so I did a search that took a lot of time on examples of how to create web service and what are the types of web services therefore I found on the internet an example of web service:

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<?php 
header('Content-type: application/xml;charset=utf-8'); 
$conn = mysql_connect("******", "******", "******") or die(sendError('Erreur Mysql')); 
mysql_select_db("******"); 
mysql_query("SET NAMES 'utf8'", $conn); 
echo "<?xml version='1.0' encoding='utf-8' ?>"; 
echo "<song> "; 
$query1 = mysql_query("SELECT * from song"); 
while($row1 = mysql_fetch_array($query1)) { 
echo" 
<song> 
<id>$row1[id]</id> 
<title>$row1[title]</title> 
<artist>$row1[description]</artist> 
<duration></duration> 
<plays></plays> 
<thumb_url>$row1[image]</thumb_url> 
</song> 
"; 

}   
echo "</song>"; 
mysql_close() ; 
?> 
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I do not know what kind of web service that is RESTful and SOAP or why I await your response thank you in advance. FrTech