**

獲取移動端ip的方法

**

function getip() {
    $ip = '';
    if (getenv ( "HTTP_CLIENT_IP" ) && strcasecmp ( getenv ( "HTTP_CLIENT_IP" ), "unknown" )) {
        $ip = getenv ( "HTTP_CLIENT_IP" );
    } else if (getenv ( "HTTP_X_FORWARDED_FOR" ) && strcasecmp ( getenv ( "HTTP_X_FORWARDED_FOR" ), "unknown" )) {
        $ip = getenv ( "HTTP_X_FORWARDED_FOR" );
    } else if (getenv ( "REMOTE_ADDR" ) && strcasecmp ( getenv ( "REMOTE_ADDR" ), "unknown" )) {
        $ip = getenv ( "REMOTE_ADDR" );
    } else if (isset ( $_SERVER ['REMOTE_ADDR'] ) && $_SERVER ['REMOTE_ADDR'] && strcasecmp ( $_SERVER ['REMOTE_ADDR'], "unknown" )) {
        $ip = $_SERVER ['REMOTE_ADDR'];
    } else {
        $ip = "unknown";
    }
    return ($ip);
}