How to Check Server Outbound IP in ThinkPHP

In a ThinkPHP project, a server-side request to https://my.ipin.io/info checks the outbound IP used by the server when it accesses the public internet. This is for operations diagnostics, proxy checks, and cloud server region verification, not visitor personalization.

API explanation

A server-side call checks the server outbound IP and returns the IP, country, region, and city exposed by the server on the public network.

{"ip":"185.220.236.7","country":"TW","region":"Taiwan","city":"Taipei"}

Use cases

These scenarios show the value of the IP information interface while clearly separating server IP from visitor IP.

These scenarios show the value of the IP information interface while clearly separating server IP from visitor IP.
How to Check Server Outbound IP in ThinkPHP
API explanation
SEO and UX recommendations

Implementation logic

Before implementation, identify the requester: server requests return server IP, while browser requests return visitor IP.

Before implementation, identify the requester: server requests return server IP, while browser requests return visitor IP.
A server-side call checks the server outbound IP and returns the IP, country, region, and city exposed by the server on the public network.
All examples below use https://my.ipin.io/info directly, with localized comments and interface text.
Default content should remain complete and readable, while regional content acts as an enhancement. Search engines can crawl stable content, and the page remains usable if the API fails.

Code example

All examples below use https://my.ipin.io/info directly, with localized comments and interface text.

ThinkPHP Controller

<?php
namespace app\controller;

use app\BaseController;

class IpController extends BaseController
{
    public function server()
    {
        $default = [
            'ip' => 'Unknown',
            'country' => 'Unknown',
            'region' => 'Unknown',
            'city' => 'Unknown',
        ];

        try {
            // Server-side call to /info: checks the server outbound IP.
            $json = @file_get_contents('https://my.ipin.io/info');
            $data = json_decode($json, true);
            $info = is_array($data) ? array_merge($default, $data) : $default;
        } catch (\Throwable $e) {
            $info = $default;
        }

        return view('server_ip', ['info' => $info]);
    }
}

server_ip.html

<div class="ip-card">
  <h2>Server outbound IP information</h2>
  <p>IP：{$info.ip|default='Unknown'}</p>
  <p>Country：{$info.country|default='Unknown'}</p>
  <p>Region：{$info.region|default='Unknown'}</p>
  <p>City：{$info.city|default='Unknown'}</p>
</div>

SEO and UX recommendations

Default content should remain complete and readable, while regional content acts as an enhancement. Search engines can crawl stable content, and the page remains usable if the API fails.

Common mistakes

The following issues affect article accuracy, code usability, and the credibility of the API explanation.

The following issues affect article accuracy, code usability, and the credibility of the API explanation.
Default content should remain complete and readable, while regional content acts as an enhancement. Search engines can crawl stable content, and the page remains usable if the API fails.
Before implementation, identify the requester: server requests return server IP, while browser requests return visitor IP.
These scenarios show the value of the IP information interface while clearly separating server IP from visitor IP.

Summary

A server-side call checks the server outbound IP and returns the IP, country, region, and city exposed by the server on the public network.

FAQ

The questions below are written specifically for this article and are directly related to the implementation.

Question：Which IP does this ThinkPHP example detect?

Answer：It detects the outbound IP of the ThinkPHP server, because the request is made by server-side code.

Question：Why is server-side IP checking useful?

Answer：It helps with VPS diagnostics, proxy node verification, cloud host region checks, and administrator monitoring.

Question：Should this diagnostic page be public?

Answer：No. Server network information is operational data and should be protected behind administrator access.

Question：What happens if the API request fails?

Answer：The example keeps fallback values, so the page does not break.

Question：How do I detect visitor IP instead?

Answer：Call the interface from the visitor browser instead of from the server.