The $_server of PHP functions

http://a.liao1.com/sherry/auto/test.php

Get domain name or host address
echo $_server[' Http_host ']. "
";//a.liao1.com

Get web Address
echo $_server[' php_self ']. "
";//sherry/auto/test.php

Get URL parameters
echo $_server["Query_string"]. "
";

Detailed address of the source page
echo $_server[' Http_referer ']. "
";
echo Site_root. "
";//http://a.liao1.com/sherry/auto

echo $_server["SERVER_NAME"];//a.liao1.com

?>

$_server["Http_user_agent"] get the model of the client browser

The difference between a function getenv ("REMOTE_ADDR") and $_server[' REMOTE_ADDR ')

Take the IP address function of the guest (client)

The getenv ("REMOTE_ADDR") function obtains the IP address normally under Apache, but in IIS, it does not work,

The $_server[' remote_addr ' function, which successfully obtains the guest's IP address in Apache, is also valid under IIS.

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