Get IP Address
Copy Code code as follows:
<?php
function GetIP () {
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;
}
echo GetIP ();
?>
Method Two
Copy Code code as follows:
function GetIP ()
{
if (getenv (' http_client_ip ')) {
$ip = getenv (' http_client_ip ');
else if (getenv (' http_x_forwarded_for ')) {
$ip = getenv (' http_x_forwarded_for ');
else if (getenv (' remote_addr ')) {
$ip = getenv (' remote_addr ');
} else {
$ip = $_server[' remote_addr '];
}
return $IP;
PHP to determine the user's city by IP address
The user's IP address has been obtained, and then we have the user's city based on this IP address. Before we start, we need to download a ready-made database QQ IP database.
Latest IP Address database: http://www.jb51.net/softs/10529.html
How to use: After decompression QQWry.Dat is we want IP address database, we create a new ipcity folder, put the database below. QQ IP database is very convenient to use, the data is also very complete, you can timely attention to the official update to maintain the latest data, a strong recommendation:
Next, we in the above ipcity directory to create a new ipaddress.php file, directly copy the following code to go in, important place also made corresponding comments. Paragraph b:
Copy Code code as follows:
?
/*
Function Name: ipCity
Parameter description: $userip--User IP address
Function: PHP to determine the user's city by IP address
Author:lee
Contact:xpsem2010@gmail.com
*/
function IpCity ($userip) {
IP database path, here is the QQ IP database 20110405 Pure version
$dat _path = ' QQWry.dat ';
Determine if the IP address is valid
if (!ereg ("^ [0-9]{1,3}.) {3} [0-9] {1,3}$ ", $userip)) {
Return to ' IP address Invalid ';
}
Open IP Database
if (! $fd = @fopen ($dat _path, ' RB ')) {
Return ' IP data file not exists or access denied ';
}
The EXPLODE function decomposes the IP address, and the result of the integer form is calculated
$userip = Explode ('. ', $userip);
$useripNum = $userip [0] * 16777216 + $userip [1] * 65536 + $userip [2] * 256 + $userip [3];
Get IP Address index start and end locations
$DataBegin = Fread ($FD, 4);
$DataEnd = Fread ($FD, 4);
$useripbegin = Implode (', Unpack (' L ', $DataBegin));
if ($useripbegin < 0) $useripbegin + = POW (2, 32);
$useripend = Implode (', Unpack (' L ', $DataEnd));
if ($useripend < 0) $useripend + = POW (2, 32);
$useripAllNum = ($useripend-$useripbegin)/7 + 1;
$BeginNum = 0;
$EndNum = $useripAllNum;
Search for matching IP address records from index records using the binary lookup method
while ($userip 1num> $useripNum | | $userip 2num< $useripNum) {
$Middle = Intval (($EndNum + $BeginNum)/2);
Offset pointer reads 4 bytes to index position
Fseek ($FD, $useripbegin + 7 * $Middle);
$useripData 1 = fread ($FD, 4);
if (strlen ($useripData 1) < 4) {
Fclose ($FD);
Return ' File Error ';
}
The extracted data is transformed and shaped, if the data is negative, plus 2 of the 32 power
$userip 1num = Implode (', Unpack (' L ', $useripData 1));
if ($userip 1num < 0) $userip 1num + + POW (2, 32);
The number of long integers fetched is greater than our IP address to modify the end position for the next loop
if ($userip 1num > $useripNum) {
$EndNum = $Middle;
Continue
}
Remove an index after fetching the previous index
$DataSeek = Fread ($FD, 3);
if (strlen ($DataSeek) < 3) {
Fclose ($FD);
Return ' File Error ';
}
$DataSeek = Implode (', Unpack (' L ', $DataSeek. chr (0)));
Fseek ($FD, $DataSeek);
$useripData 2 = fread ($FD, 4);
if (strlen ($useripData 2) < 4) {
Fclose ($FD);
Return ' File Error ';
}
$userip 2num = Implode (', Unpack (' L ', $useripData 2));
if ($userip 2num < 0) $userip 2num + + POW (2, 32);
Could not find IP address corresponding city
if ($userip 2num < $useripNum) {
if ($Middle = = $BeginNum) {
Fclose ($FD);
Return ' No Data ';
}
$BeginNum = $Middle;
}
}
$useripFlag = Fread ($FD, 1);
if ($useripFlag = = Chr (1)) {
$useripSeek = Fread ($FD, 3);
if (strlen ($useripSeek) < 3) {
Fclose ($FD);
Return ' System Error ';
}
$useripSeek = Implode (', Unpack (' L ', $useripSeek. chr (0)));
Fseek ($FD, $useripSeek);
$useripFlag = Fread ($FD, 1);
}
if ($useripFlag = = Chr (2)) {
$AddrSeek = Fread ($FD, 3);
if (strlen ($AddrSeek) < 3) {
Fclose ($FD);
Return ' System Error ';
}
$useripFlag = Fread ($FD, 1);
if ($useripFlag = = Chr (2)) {
$AddrSeek 2 = fread ($FD, 3);
if (strlen ($AddrSeek 2) < 3) {
Fclose ($FD);
Return ' System Error ';
}
$AddrSeek 2 = implode (', Unpack (' L ', $AddrSeek 2.chr (0)));
Fseek ($FD, $AddrSeek 2);
} else {
Fseek ($FD,-1, seek_cur);
}
while (($char = Fread ($FD, 1))!= chr (0))
$useripAddr 2. = $char;
$AddrSeek = Implode (', Unpack (' L ', $AddrSeek. chr (0)));
Fseek ($FD, $AddrSeek);
while (($char = Fread ($FD, 1))!= chr (0))
$useripAddr 1. = $char;
} else {
Fseek ($FD,-1, seek_cur);
while (($char = Fread ($FD, 1))!= chr (0))
$useripAddr 1. = $char;
$useripFlag = Fread ($FD, 1);
if ($useripFlag = = Chr (2)) {
$AddrSeek 2 = fread ($FD, 3);
if (strlen ($AddrSeek 2) < 3) {
Fclose ($FD);
Return ' System Error ';
}
$AddrSeek 2 = implode (', Unpack (' L ', $AddrSeek 2.chr (0)));
Fseek ($FD, $AddrSeek 2);
} else {
Fseek ($FD,-1, seek_cur);
}
while (($char = Fread ($FD, 1))!= chr (0)) {
$useripAddr 2. = $char;
}
}
Fclose ($FD);
Returns the city result of the IP address
if (Preg_match ('/http/i ', $useripAddr 2)) {
$useripAddr 2 = ';
}
$USERIPADDR = "$useripAddr 1 $useripAddr 2";
$USERIPADDR = preg_replace ('/cz88.net/is ', ', ', $useripaddr);
$USERIPADDR = preg_replace ('/^s*/is ', ', ', $useripaddr);
$USERIPADDR = preg_replace ('/s*$/is ', ', ', $useripaddr);
if (Preg_match ('/http/i ', $useripaddr) | | $useripaddr = = ') {
$useripaddr = ' No Data ';
}
return $useripaddr;
}
?>
PHP to achieve city switching or jump based on IP address
Here, in fact, the problem has been very simple, with simple JS will be all done. Paragraph C reads as follows:
Jump the specified page based on the IP address JS get the city
Copy Code code as follows:
var city= ' <?echo ipCity ($xp _userip);? > ';
Jump to a specified page for all cities based on IP address
Copy Code code as follows:
if (City.indexof ("Shanghai City") >=0) {
Window.location.href= "http://shanghai.demo.com/";
}
Place the first section A and the C section of code on the head and tail of code B, and then we add the following code to the page where we want to jump:
Copy Code code as follows:
<script src= "/ipcity/ipaddress.php" type= "Text/javascript" language= "JavaScript" ></script>
Refresh the page, is not to achieve the desired effect?
The above code is just simple to judge the IP there to jump to that, if there is such as, I want to the Hunan all IP jumped to Changsha, it is like Hengyang, irrepressible Liu Yang, Leiyang these will be done many times the parent line processing, want to know, please see the episode.
