示例代码如下
<?php
/**获取客户端IP */
function getIp()
{
if ($_SERVER["HTTP_CLIENT_IP"] && strcasecmp($_SERVER["HTTP_CLIENT_IP"], "unknown")) {
$ip = $_SERVER["HTTP_CLIENT_IP"];
} else {
if ($_SERVER["HTTP_X_FORWARDED_FOR"] && strcasecmp($_SERVER["HTTP_X_FORWARDED_FOR"], "unknown")) {
$ip = $_SERVER["HTTP_X_FORWARDED_FOR"];
} else {
if ($_SERVER["REMOTE_ADDR"] && strcasecmp($_SERVER["REMOTE_ADDR"], "unknown")) {
$ip = $_SERVER["REMOTE_ADDR"];
} else {
if (
isset($_SERVER['REMOTE_ADDR']) && $_SERVER['REMOTE_ADDR'] && strcasecmp(
$_SERVER['REMOTE_ADDR'],
"unknown"
)
) {
$ip = $_SERVER['REMOTE_ADDR'];
} else {
$ip = "unknown";
}
}
}
}
return ($ip);
}
echo getIp();