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functions.php
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functions.php
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<?php
if (!defined('IN_XSS_PLATFORM')) {
exit('Access Denied');
}
require_once("load.php");
//nginx无getallheaders函数
if (!function_exists('getallheaders')) {
function getallheaders() {
foreach ($_SERVER as $name => $value) {
if (substr($name, 0, 5) == 'HTTP_') {
$headers[str_replace(' ', '-', ucwords(strtolower(str_replace('_', ' ', substr($name, 5)))))] = $value;
}
}
return $headers;
}
}
//判断该记录是否
function isKeepSession($info) {
$keepsession = false;
foreach ($info['get_data'] as $k => $v) {
if ($k === "keepsession") {
$keepsession = ($v === "1" ? true : false);
return $keepsession;
}
}
foreach ($info['post_data'] as $k => $v) {
if ($k === "keepsession") {
$keepsession = ($v === "1" ? true : false);
return $keepsession;
}
}
foreach ($info['cookie_data'] as $k => $v) {
if ($k === "keepsession") {
$keepsession = ($v === "1" ? true : false);
return $keepsession;
}
}
return $keepsession;
}
//xss过滤
function stripStr($str) {
if (get_magic_quotes_gpc())
$str = stripslashes($str);
return htmlspecialchars($str, ENT_QUOTES, 'UTF-8');
}
function stripArr($arr) {
$new_arr = array();
foreach ($arr as $k => $v) {
$new_arr[stripStr($k)] = stripStr($v);
}
return $new_arr;
}
//尝试base64解码
function tryBase64Decode($arr) {
if (isset($arr) && count($arr) > 0) {
$isChanged = 0;
$new_arr = array();
foreach ($arr as $k => $v) {
$decoded_v = "";
if (isBase64Formatted($v)) {
$decoded_v = base64_decode($v);
$isChanged = 1;
}
$new_arr[$k] = $decoded_v;
}
if ($isChanged)
return $new_arr;
else
return false;
} else
return false;
}
//判断string是否为base64编码（判断方法：解码后为可见字符串）
function isBase64Formatted($str) {
if (preg_match('/^[A-Za-z0-9+\/=]+$/', $str))
if ($str == base64_encode(base64_decode($str)))
if (preg_match('/^[A-Za-z0-9\x00-\x80~!@#$%&_+-=:";\'<>,\/"\[\]\\\^\.\|\?\*\+\(\)\{\}\s]+$/', base64_decode($str)))
return true;
return false;
}
function encrypt($info) {
if (ENCRYPT_ENABLE) {
if (ENCRYPT_TYPE === "AES") {
require_once("aes.php");
$info = AESEncryptCtr($info, ENCRYPT_PASS);
} else {
require_once("rc4.php");
$info = base64_encode(rc4($info, ENCRYPT_PASS));
}
} else
$info = base64_encode($info);
return $info;
}
function decrypt($info) {
if (ENCRYPT_ENABLE) {
if (ENCRYPT_TYPE === "AES") {
require_once("aes.php");
$info = AESDecryptCtr($info, ENCRYPT_PASS);
} else {
require_once("rc4.php");
$info = rc4(base64_decode($info), ENCRYPT_PASS);
}
} else
$info = base64_decode($info);
return $info;
}
//获得访问者真实ip
function getRealIP(){
$ip="unknown";
if (XFF_ENABLE) {
foreach (array('HTTP_CLIENT_IP', 'HTTP_X_FORWARDED_FOR', 'HTTP_X_FORWARDED', 'HTTP_FORWARDED_FOR', 'HTTP_VIA', 'HTTP_FROM', 'REMOTE_ADDR') as $v) {
if (isset($_SERVER[$v])) {
if (! preg_match('/^\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}$/', $_SERVER[$v])) {
continue;
}
$ip = $_SERVER[$v];
break;
}
}
}
else {
if ( isset($_SERVER['REMOTE_ADDR']) )
$ip = $_SERVER['REMOTE_ADDR'];
}
return $ip;
}
//基于Discuz X3.1 function_misc.php 函数已过滤，可直接输出
function convertIP($ip, $ipdatafile) {
$ipaddr = '未知';
if (preg_match("/^\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}$/", $ip)) {
$iparray = explode('.', $ip);
if ($iparray[0] == 10 || $iparray[0] == 127 || ($iparray[0] == 192 && $iparray[1] == 168) || ($iparray[0] == 172 && ($iparray[1] >= 16 && $iparray[1] <= 31))) {
$ipaddr = '局域网';
} elseif ($iparray[0] > 255 || $iparray[1] > 255 || $iparray[2] > 255 || $iparray[3] > 255) {
$ipaddr = '错误ip';
} else {
if (@file_exists($ipdatafile)) {
if (!$fd = @fopen($ipdatafile, 'rb')) {
return 'ip库出错';
}
$ip = explode('.', $ip);
$ipNum = $ip[0] * 16777216 + $ip[1] * 65536 + $ip[2] * 256 + $ip[3];
if (!($DataBegin = fread($fd, 4)) || !($DataEnd = fread($fd, 4)))
return;
@$ipbegin = implode('', unpack('L', $DataBegin));
if ($ipbegin < 0)
$ipbegin += pow(2, 32);
@$ipend = implode('', unpack('L', $DataEnd));
if ($ipend < 0)
$ipend += pow(2, 32);
$ipAllNum = ($ipend - $ipbegin) / 7 + 1;
$BeginNum = $ip2num = $ip1num = 0;
$ipAddr1 = $ipAddr2 = '';
$EndNum = $ipAllNum;
while ($ip1num > $ipNum || $ip2num < $ipNum) {
$Middle = intval(($EndNum + $BeginNum) / 2);
fseek($fd, $ipbegin + 7 * $Middle);
$ipData1 = fread($fd, 4);
if (strlen($ipData1) < 4) {
fclose($fd);
return '系统错误';
}
$ip1num = implode('', unpack('L', $ipData1));
if ($ip1num < 0)
$ip1num += pow(2, 32);
if ($ip1num > $ipNum) {
$EndNum = $Middle;
continue;
}
$DataSeek = fread($fd, 3);
if (strlen($DataSeek) < 3) {
fclose($fd);
return '系统错误';
}
$DataSeek = implode('', unpack('L', $DataSeek . chr(0)));
fseek($fd, $DataSeek);
$ipData2 = fread($fd, 4);
if (strlen($ipData2) < 4) {
fclose($fd);
return '系统错误';
}
$ip2num = implode('', unpack('L', $ipData2));
if ($ip2num < 0)
$ip2num += pow(2, 32);
if ($ip2num < $ipNum) {
if ($Middle == $BeginNum) {
fclose($fd);
return '未知';
}
$BeginNum = $Middle;
}
}
$ipFlag = fread($fd, 1);
if ($ipFlag == chr(1)) {
$ipSeek = fread($fd, 3);
if (strlen($ipSeek) < 3) {
fclose($fd);
return '系统错误';
}
$ipSeek = implode('', unpack('L', $ipSeek . chr(0)));
fseek($fd, $ipSeek);
$ipFlag = fread($fd, 1);
}
if ($ipFlag == chr(2)) {
$AddrSeek = fread($fd, 3);
if (strlen($AddrSeek) < 3) {
fclose($fd);
return '系统错误';
}
$ipFlag = fread($fd, 1);
if ($ipFlag == chr(2)) {
$AddrSeek2 = fread($fd, 3);
if (strlen($AddrSeek2) < 3) {
fclose($fd);
return '系统错误';
}
$AddrSeek2 = implode('', unpack('L', $AddrSeek2 . chr(0)));
fseek($fd, $AddrSeek2);
} else {
fseek($fd, -1, SEEK_CUR);
}
while (($char = fread($fd, 1)) != chr(0))
$ipAddr2 .= $char;
$AddrSeek = implode('', unpack('L', $AddrSeek . chr(0)));
fseek($fd, $AddrSeek);
while (($char = fread($fd, 1)) != chr(0))
$ipAddr1 .= $char;
} else {
fseek($fd, -1, SEEK_CUR);
while (($char = fread($fd, 1)) != chr(0))
$ipAddr1 .= $char;
$ipFlag = fread($fd, 1);
if ($ipFlag == chr(2)) {
$AddrSeek2 = fread($fd, 3);
if (strlen($AddrSeek2) < 3) {
fclose($fd);
return '系统错误';
}
$AddrSeek2 = implode('', unpack('L', $AddrSeek2 . chr(0)));
fseek($fd, $AddrSeek2);
} else {
fseek($fd, -1, SEEK_CUR);
}
while (($char = fread($fd, 1)) != chr(0))
$ipAddr2 .= $char;
}
fclose($fd);
$ipAddr1 = iconv("gb18030", "utf-8//IGNORE", $ipAddr1);
if ($ipAddr2) {
if (ord($ipAddr2{0}) == 2)
$ipAddr2 = "";
else
$ipAddr2 = iconv("gb18030", "utf-8//IGNORE", $ipAddr2);
}
if (preg_match('/http/i', $ipAddr2)) {
$ipAddr2 = '';
}
$ipaddr = $ipAddr1 . $ipAddr2;
$ipaddr = preg_replace('/CZ88\.NET/is', '', $ipaddr);
$ipaddr = preg_replace('/^\s*/is', '', $ipaddr);
$ipaddr = preg_replace('/\s*$/is', '', $ipaddr);
if (preg_match('/http/i', $ipaddr) || $ipaddr == '') {
$ipaddr = '未知';
}
return htmlspecialchars($ipaddr, ENT_QUOTES, 'UTF-8');
}
}
}
return $ipaddr;
}