Individuare città da indirizzo IP visitatore

[sourcecode language=”php”]
<?php
function detect_city($ip) {
$default = ‘UNKNOWN’;
if (!is_string($ip) || strlen($ip) < 1 || $ip == ‘127.0.0.1’ || $ip == ‘localhost’)
$ip = ‘8.8.8.8’;
$curlopt_useragent = ‘Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.2) Gecko/20100115 Firefox/3.6 (.NET CLR 3.5.30729)’;
$url = ‘http://ipinfodb.com/ip_locator.php?ip=’ . urlencode($ip);
$ch = curl_init();
$curl_opt = array(
CURLOPT_FOLLOWLOCATION => 1,
CURLOPT_HEADER => 0,
CURLOPT_RETURNTRANSFER => 1,
CURLOPT_USERAGENT => $curlopt_useragent,
CURLOPT_URL => $url,
CURLOPT_TIMEOUT => 1,
CURLOPT_REFERER => ‘http://’ . $_SERVER[‘HTTP_HOST’],
);
curl_setopt_array($ch, $curl_opt);
$content = curl_exec($ch);
if (!is_null($curl_info)) {
$curl_info = curl_getinfo($ch);
}
curl_close($ch);
if ( preg_match(‘{<li>Città : ([^<]*)</li>}i’, $content, $regs) ) {
$city = $regs[1];
}
if ( preg_match(‘{<li>Stato/Provincia : ([^<]*)</li>}i’, $content, $regs) ) {
$state = $regs[1];
}
if( $city!=” && $state!=” ){
$location = $city . ‘, ‘ . $state;
return $location;
}else{
return $default;
}
}
echo $_SERVER[REMOTE_ADDR];
echo "<hr>";
print (detect_city($_SERVER[REMOTE_ADDR]));
?>
[/sourcecode]

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