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<?php
$browser = getenv(“HTTP_USER_AGENT”);
echo '<p>HTTP User Agent is: ' . $browser . '</p>';

if (eregi(‘iPhone’, $browser))
{
	echo 'You are using an iPhone';
} 
else if (eregi(‘Blackberry’, $browser))
{
	echo 'You are using a Blackberry';
}
else if (eregi(‘Android’, $browser))
{
	echo 'You are using an Android';
}
else 
{
 	echo 'browser undetected';
}
?>