php 取得用戶端IP地址代碼

取得用戶端ip地址
<?

//開原始碼

function getip(){
             if (getenv("http_client_ip") && strcasecmp(getenv("http_client_ip"), "unknown"))
$ip = getenv("http_client_ip"); //開源
             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);
}
?>

判斷郵箱地址
<?
function checkemail($inaddress)
{
return (ereg("^([a-za-z0-9_-])+@([a-za-z0-9_-])+(.[a-za-z0-9_-])+",$inaddress));
}
?>

<?
function getip() { //擷取ip
if ($_server["http_x_forwarded_for"])
$ip = $_server["http_x_forwarded_for"]; //
    else if ($_server["http_client_ip"])
$ip = $_server["http_client_ip"];
    else if ($_server["remote_addr"])
$ip = $_server["remote_addr"]; //
    else if (getenv("http_x_forwarded_for"))
$ip = getenv("http_x_forwarded_for");
    else if (getenv("http_client_ip"))
$ip = getenv("http_client_ip"); //
    else if (getenv("remote_addr"))
$ip = getenv("remote_addr");
    else
$ip = "unknown";
    return $ip;
}
?>