lt;?php
error_reporting(7);
session_start();
//Send character header information
if ($headercharset)
header("Content-Type: text/html; charset=gb2312");
//Load public *** file
require_once("config.php");
require_once("global.php");
require_once("db_mysql.php");
/**************** Verify whether the client can access this website************/
//Get the client IP
if(getenv('HTTP_CLIENT_IP')) {
$client_ip = getenv('HTTP_CLIENT_IP');
} elseif (getenv('HTTP_X_FORWARDED_FOR')) {
$client_ip = getenv('HTTP_X_FORWARDED_FOR');
} elseif(getenv('REMOTE_ADDR')) {
$client_ip = getenv('REMOTE_ADDR');
} else {
$client_ip = $HTTP_SERVER_VARS['REMOTE_ADDR'];
}
//Decompose the client IP
$cip = explode(".", $client_ip);
//Connect to the database
$db = new DB_Sql();
$err = $db-gt; connect();
/* Restrict remote IP access, PS: This code is really confusing, haha, use it 8 ifs, -_-# */
// Extract the stored IP address to be restricted from the database
$query_str = "SELECT limit_ip FROM us_limitip";
p>$db-gt; query($query_str);
// Extract the results in a loop and verify them one by one
while ($db-gt; next_record ())
{
$limit_ip = $db-gt;f("limit_ip");
$lip = explode(".", $ limit_ip);
//If the first character in the limit IP is * or 0, it will jump to the error page
if (($lip[0]=='*' ) || ($lip[0]=='0'))
header("Location: ../error.php?errid=300");
// If the client IP happens to be equal to our limit IP, it will jump to the error page
if ($client_ip==$limit_ip)
header("Location: ../error.php?errid =300");
//
If the first set of IPs are consistent, match the second set of IPs
if ($cip[0] == $lip[0])
{
// If the second group of restricted IP is *, jump to the error page
if ($lip[1]=='*')
header("Location: ../ error.php?errid=300");
//The second set of IP matches will be matched with the third set of IPs
if ($cip[1]==$lip[ 1])
{
// If the third set of restricted characters is *, jump to the error page
if ($lip[2]==' *')
header("Location：../error.php?errid=300");
// If the third group of IPs matches, jump to the third group of schools. Verify
if ($cip[2]==$lip[2])
{
// If the fourth group of restricted IP is * or 0 Just jump to the error page
if (($lip[3]=='*') || ($lip[3]=='0'))
header( "Location: ../error.php?errid=300");
}
}
}
}
// Release database query results
$db-gt; free();
/****************** ***IP verification ended******************/gt;