Php ip address retrieval problems

The php ip address retrieval problem seems to be different from the actual IP address obtained by $ _ SERVER. I don't know what the problem is. how can I get the IP address? Now this data is very important to this project, so it is more accurate to use JavaScript? There is a data: 211.139.151.74 & nbsp; IP address you query: 211.139.151.74 & nbsp; master data of this site: Guangdong Mobile php ip address acquisition problem
The IP address obtained with $ _ SERVER seems to be different from the actual IP address. I don't know what's going on.
How do you obtain the IP address?
This data is very important to this project, so the requirements are more accurate.
Will JavaScript be more accurate?

The data is 211.139.151.74.

IP address: 211.139.151.74
Main data of this site: Guangdong Mobile (sharing across the province)
Result 2: Guangdong Mobile (sharing across the province)
Query Result 3: Guangdong Mobile GPRS (General in the province)
What does that mean?

------ Solution --------------------
· Under normal circumstances, js does not have the permission to obtain information such as ip addresses.
· If you need to be more accurate, consider using plug-ins.
------ Solution --------------------
Unset ($ onlineip );

If ($ _ SERVER ['http _ CLIENT_IP ']) {
$ Onlineip = $ _ SERVER ['http _ CLIENT_IP '];
} Elseif ($ _ SERVER ['http _ X_FORWARDED_FOR ']) {
$ Onlineip = $ _ SERVER ['http _ X_FORWARDED_FOR '];
} Else {
$ Onlineip = $ _ SERVER ['remote _ ADDR '];
}
------ Solution --------------------
The IP address obtained with $ _ SERVER seems to be different from the actual IP address. I don't know what's going on ??
Is it intranet? Otherwise, there should be no discrepancies.

IP address: 211.139.151.74
Main data of this site: Guangdong Mobile (sharing across the province)
Result 2: Guangdong Mobile (sharing across the province)
Query Result 3: Guangdong Mobile GPRS (General in the province)
What does that mean?

Are you going to someone else's website to check IP information?