Display icecast2 listeners count by country and by city

geo.php

<?php
$login = 'admin';
$password = '<password>';
$mount = '/radio';
$server = '<ip>:8000';
$url = "http://$server/admin/listclients?mount=$mount";
$opts = array('http' => array(
        'method' => 'GET',
        'header' => 'Authorization: Basic '.base64_encode("$login:$password")."\r\n"
));
$context = stream_context_create($opts);
$xml = @file_get_contents($url, false, $context);
if( !$xml ) {
        echo "<p>Sorry, no mountpoint found.</p>\n";
        exit();
}
$listeners = new SimpleXMLElement($xml);
$unknown = 'Unknown';
$bycity = array();
$bycountry = array();
foreach( $listeners->source->listener as $listener ) {
        $l = array();
        $l['ip'] = (string)$listener->IP;
        $l['time'] = (string)$listener->Connected;
        if( geoip_db_avail(GEOIP_COUNTRY_EDITION) )
            $l['country'] = geoip_country_name_by_name($l['ip']);
        $geo = @geoip_record_by_name($l['ip']);
        if( $geo && isset($geo['country_name']) && strlen($geo['country_name']) > 0 )
                $l['country'] = $geo['country_name'];
        if( $geo && isset($geo['city']) && strlen($geo['city']) > 0 )
                $l['city'] = $geo['city'];

        $country = isset($l['country']) ? $l['country'] : $unknown;
        if( isset($bycountry[$country]) )
                $bycountry[$country]++;
        else
                $bycountry[$country] = 1;

        if( isset($l['city']) ) {
                $city = $l['city'].', '.$country;
                if( isset($bycity[$city]) )
                        $bycity[$city]++;
                else
                        $bycity[$city] = 1;
        }
}

echo "<h1>Geo Statistics for $mount</h1>";
arsort($bycountry);
echo '<p>By country:</p>';
foreach( $bycountry as $c => $v )
        echo "$c: $v<br>";

arsort($bycity);
echo '<p>By city:</p>';
foreach( $bycity as $c => $v )
        echo "$c: $v<br>";