Use the Sina IP address library to retrieve the PHP version of the user's city and region

Introduction: This is a detailed page for retrieving the PHP version of the user's city and region using the Sina IP address library. It introduces PHP, related knowledge, skills, experience, and some PHP source code.

Class = 'pingjiaf' frameborder = '0' src = 'HTTP: // biancheng.dnbc?info/pingjia.php? Id = 327018 'rolling = 'no'>

<? PHP
/* $ IP = real_ip ();
$ Url = 'HTTP: // int.dpool.sina.com.cn/iplookup/iplookup.php? Format = JS & IP = '. $ IP;
$ Content = fopen_url ($ URL );
$ Exp = '/Country ":"(.*?) "," Province ":"(.*?) "," City ":"(.*?) "," District ":" "," ISP ":"(.*?) "," Type/s ';
$ Content = unicodedecode ($ content );
If (preg_match ($ exp, $ content, $ matche )){
Echo 'hello, friend from '. $ matche [1]. $ matche [2]. $ matche [3 .';
} Elseif (preg_match ('/"RET":-1, "ip ":"(.*?) "/', $ Content, $ matche )){
Echo 'you are using a LAN, and the lan ip address is '. $ matche [1];
} Else {
Echo 'you are from Mars. ';
}*/

/**
*/
function ipfungetcitynamebyid () {
$ url = 'HTTP: // int.dpool.sina.com.cn/iplookup/iplookup.php? Format = JS & IP = '. ipfunreal_ip ();
$ content = ipfunfopen_url ($ URL);
$ exp = '/Country ":"(. *?) "," Province ":"(.*?) "," City ":"(.*?) "," District ":" "," ISP ":"(.*?) "," Type/s';
$ content = ipfununicodedecode ($ content);
If (preg_match ($ exp, $ content, $ matche )) {
return $ matche [3];
}else
return "";
}

// curl: Obtain the URL content
function ipfunfopen_url ($ URL)
{< br> If (function_exists ('file _ get_contents ')) {
$ file_content = @ file_get_contents ($ URL);
}elseif (ini_get ('Allow _ url_fopen ') & ($ file = @ fopen ($ URL, 'rb') {
$ I = 0;
while (! Feof ($ file) & $ I ++ <1000) {
$ file_content. = strtolower (fread ($ file, 4096);
}< br> fclose ($ file);
}elseif (function_exists ('curl _ init ')) {
$ curl_handle = curl_init ();
curl_setopt ($ curl_handle, curlopt_url, $ URL);
curl_setopt ($ curl_handle, curlopt_connecttimeout, 2 );
curl_setopt ($ curl_handle, rule, 1);
curl_setopt ($ curl_handle, curlopt_failonerror, 1);
curl_setopt ($ curl_handle, curlopt_useragent, 'trackback spam check');
$ file_content = curl_exec ($ curl_handle);
curl_close ($ curl_handle );
}else {
$ file_content = '';
}< br> return $ file_content;
}

Function ipfununicodedecode ($ content)
{
// Convert the Unicode encoding to gb2312 encoding.
$ Pattern = '/(\ U ([\ W] {4})/I ';
Preg_match_all ($ pattern, $ content, $ matches );
If (! Empty ($ matches ))
{
For ($ J = 0; $ j <count ($ matches [0]); $ J ++)
{
$ STR = $ matches [0] [$ J];
If (strpos ($ STR, '\ U') = 0)
{
$ Code = base_convert (substr ($ STR, 2, 2), 16, 10 );
$ Code2 = base_convert (substr ($ STR, 4), 16, 10 );

$ C = CHR ($ Code). CHR ($ code2 );
$ C = mb_convert_encoding ($ C, "UTF-8", 'ucs-2 ');
// $ C = iconv ('ucs-2', 'gb2312', $ C );
$ Content = str_replace ($ matches [0] [$ J], $ C, $ content );
}
Else
{
$ Content. = $ STR;
}
}
}
Return $ content;
}

Function ipfunreal_ip ()
{
Static $ realip = NULL;

If ($ realip! = NULL)
{
Return $ realip;
}

If (isset ($ _ server ))
{
If (isset ($ _ server ['HTTP _ x_forwarded_for '])
{
$ Arr = explode (',', $ _ server ['HTTP _ x_forwarded_for ']);

/* Obtain the first non-unknown valid IP string in X-forwarded-*/
Foreach ($ arr as $ IP)
{
$ IP = trim ($ IP );

If ($ IP! = 'Unknown ')
{
$ Realip = $ IP;

Break;
}
}
}
Elseif (isset ($ _ server ['HTTP _ client_ip '])
{
$ Realip = $ _ server ['HTTP _ client_ip '];
}
Else
{
If (isset ($ _ server ['remote _ ADDR '])
{
$ Realip = $ _ server ['remote _ ADDR '];
}
Else
{
$ Realip = '0. 0.0.0 ';
}
}
}
Else
{
If (getenv ('HTTP _ x_forwarded_for '))
{
$ Realip = getenv ('HTTP _ x_forwarded_for ');
}
Elseif (getenv ('HTTP _ client_ip '))
{
$ Realip = getenv ('HTTP _ client_ip ');
}
Else
{
$ Realip = getenv ('remote _ ADDR ');
}
}

Preg_match ("/[\ D \.] {7, 15}/", $ realip, $ onlineip );
$ Realip =! Empty ($ onlineip [0])? $ Onlineip [0]: '0. 0.0.0 ';

Return $ realip;
}

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