<?php 
function get_server_ip()
{
    if (isset($_SERVER)) {
        if ($_SERVER['SERVER_ADDR']) {
            $server_ip = $_SERVER['SERVER_ADDR'];
        } else {
            $server_ip = $_SERVER['LOCAL_ADDR'];
        }
    } else {
        $server_ip = getenv('SERVER_ADDR');
    }
    return $server_ip;
}
echo get_server_ip();
?>
<?php 
if ('/' == DIRECTORY_SEPARATOR) {
    $server_ip = $_SERVER['SERVER_ADDR'];
} else {
    $server_ip = @gethostbyname($_SERVER['SERVER_NAME']);
}
echo $server_ip;
?>
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