function PMA_getIp()
{
global $REMOTE_ADDR;
global $HTTP_X_FORWARDED_FOR, $HTTP_X_FORWARDED, $HTTP_FORWARDED_FOR, $HTTP_FORWARDED;
global $HTTP_VIA, $HTTP_X_COMING_FROM, $HTTP_COMING_FROM;
// Get some server/environment variables values
if (empty($REMOTE_ADDR)) {
if (!empty($_SERVER) && isset($_SERVER['REMOTE_ADDR'])) {
$REMOTE_ADDR = $_SERVER['REMOTE_ADDR'];
}
else if (!empty($_ENV) && isset($_ENV['REMOTE_ADDR'])) {
$REMOTE_ADDR = $_ENV['REMOTE_ADDR'];
}
else if (@getenv('REMOTE_ADDR')) {
$REMOTE_ADDR = getenv('REMOTE_ADDR');
}
} // end if
if (empty($HTTP_X_FORWARDED_FOR)) {
if (!empty($_SERVER) && isset($_SERVER['HTTP_X_FORWARDED_FOR'])) {
$HTTP_X_FORWARDED_FOR = $_SERVER['HTTP_X_FORWARDED_FOR'];
}
else if (!empty($_ENV) && isset($_ENV['HTTP_X_FORWARDED_FOR'])) {
$HTTP_X_FORWARDED_FOR = $_ENV['HTTP_X_FORWARDED_FOR'];
}
else if (@getenv('HTTP_X_FORWARDED_FOR')) {
$HTTP_X_FORWARDED_FOR = getenv('HTTP_X_FORWARDED_FOR');
}
} // end if
if (empty($HTTP_X_FORWARDED)) {
if (!empty($_SERVER) && isset($_SERVER['HTTP_X_FORWARDED'])) {
$HTTP_X_FORWARDED = $_SERVER['HTTP_X_FORWARDED'];
}
else if (!empty($_ENV) && isset($_ENV['HTTP_X_FORWARDED'])) {
$HTTP_X_FORWARDED = $_ENV['HTTP_X_FORWARDED'];
}
else if (@getenv('HTTP_X_FORWARDED')) {
$HTTP_X_FORWARDED = getenv('HTTP_X_FORWARDED');
}
} // end if
if (empty($HTTP_FORWARDED_FOR)) {
if (!empty($_SERVER) && isset($_SERVER['HTTP_FORWARDED_FOR'])) {
$HTTP_FORWARDED_FOR = $_SERVER['HTTP_FORWARDED_FOR'];
}
else if (!empty($_ENV) && isset($_ENV['HTTP_FORWARDED_FOR'])) {
$HTTP_FORWARDED_FOR = $_ENV['HTTP_FORWARDED_FOR'];
}
else if (@getenv('HTTP_FORWARDED_FOR')) {
$HTTP_FORWARDED_FOR = getenv('HTTP_FORWARDED_FOR');
}
} // end if
if (empty($HTTP_FORWARDED)) {
if (!empty($_SERVER) && isset($_SERVER['HTTP_FORWARDED'])) {
$HTTP_FORWARDED = $_SERVER['HTTP_FORWARDED'];
}
else if (!empty($_ENV) && isset($_ENV['HTTP_FORWARDED'])) {
$HTTP_FORWARDED = $_ENV['HTTP_FORWARDED'];
}
else if (@getenv('HTTP_FORWARDED')) {
$HTTP_FORWARDED = getenv('HTTP_FORWARDED');
}
} // end if
if (empty($HTTP_VIA)) {
if (!empty($_SERVER) && isset($_SERVER['HTTP_VIA'])) {
$HTTP_VIA = $_SERVER['HTTP_VIA'];
}
else if (!empty($_ENV) && isset($_ENV['HTTP_VIA'])) {
$HTTP_VIA = $_ENV['HTTP_VIA'];
}
else if (@getenv('HTTP_VIA')) {
$HTTP_VIA = getenv('HTTP_VIA');
}
} // end if
if (empty($HTTP_X_COMING_FROM)) {
if (!empty($_SERVER) && isset($_SERVER['HTTP_X_COMING_FROM'])) {
$HTTP_X_COMING_FROM = $_SERVER['HTTP_X_COMING_FROM'];
}
else if (!empty($_ENV) && isset($_ENV['HTTP_X_COMING_FROM'])) {
$HTTP_X_COMING_FROM = $_ENV['HTTP_X_COMING_FROM'];
}
else if (@getenv('HTTP_X_COMING_FROM')) {
$HTTP_X_COMING_FROM = getenv('HTTP_X_COMING_FROM');
}
} // end if
if (empty($HTTP_COMING_FROM)) {
if (!empty($_SERVER) && isset($_SERVER['HTTP_COMING_FROM'])) {
$HTTP_COMING_FROM = $_SERVER['HTTP_COMING_FROM'];
}
else if (!empty($_ENV) && isset($_ENV['HTTP_COMING_FROM'])) {
$HTTP_COMING_FROM = $_ENV['HTTP_COMING_FROM'];
}
else if (@getenv('HTTP_COMING_FROM')) {
$HTTP_COMING_FROM = getenv('HTTP_COMING_FROM');
}
} // end if
// Gets the default ip sent by the user
if (!empty($REMOTE_ADDR)) {
$direct_ip = $REMOTE_ADDR;
}
// Gets the proxy ip sent by the user
$proxy_ip = '';
if (!empty($HTTP_X_FORWARDED_FOR)) {
$proxy_ip = $HTTP_X_FORWARDED_FOR;
} else if (!empty($HTTP_X_FORWARDED)) {
$proxy_ip = $HTTP_X_FORWARDED;
} else if (!empty($HTTP_FORWARDED_FOR)) {
$proxy_ip = $HTTP_FORWARDED_FOR;
} else if (!empty($HTTP_FORWARDED)) {
$proxy_ip = $HTTP_FORWARDED;
} else if (!empty($HTTP_VIA)) {
$proxy_ip = $HTTP_VIA;
} else if (!empty($HTTP_X_COMING_FROM)) {
$proxy_ip = $HTTP_X_COMING_FROM;
} else if (!empty($HTTP_COMING_FROM)) {
$proxy_ip = $HTTP_COMING_FROM;
} // end if... else if...
// Returns the true IP if it has been found, else FALSE
if (empty($proxy_ip)) {
// True IP without proxy
return $direct_ip;
} else {
$is_ip = preg_match('|^([0-9]{1,3}\.){3,3}[0-9]{1,3}|', $proxy_ip, $regs);
if ($is_ip && (count($regs) > 0)) {
// True IP behind a proxy
return $regs[0];
} else {
// Can't define IP: there is a proxy but we don't have
// information about the true IP
return FALSE;
}
} // end if... else...
} // end of the 'PMA_getIp()' function
