thinkphp gets request ip

In web development, it is usually necessary to obtain the client's IP address. When using the PHP framework ThinkPHP, it is very easy to obtain the request IP address. This article will briefly introduce how to obtain the request IP address in the ThinkPHP framework.

1. Obtain the client IP address

Obtaining the client IP address is a common requirement in any web development. In the ThinkPHP framework, we can obtain the client IP address through the following code:

$request =     hinkRequest::instance();
$ip = $request->ip();

Among them, hinkRequest::instance() obtains the request instance, and $request->ip() obtains the request IP address.

2. Obtain the client’s real IP address

Because the client IP address can be easily forged, it is necessary to obtain the client’s real IP address in some scenarios. At this point, we can get it by getting the X-Forwarded-For in the HTTP header.

$request =     hinkRequest::instance();
$ip = $request->header('x-forwarded-for');

The x-forwarded-for here is a field in the HTTP header, which often contains the client's real IP address (if there are multiple IP addresses, separated by commas). It should be noted that some proxy servers do not add the x-forwarded-for field in the HTTP header, so this method may not be able to obtain the client's real IP address in some cases.

3. Obtain the server IP address

Sometimes we need to obtain the server IP address, such as when determining the current website operating environment. In the ThinkPHP framework, we can obtain the server IP address through the following code:

$server_ip = gethostbyname($_SERVER["SERVER_NAME"]);

Among them, $_SERVER["SERVER_NAME"] represents the domain name of the current server, and the gethostbyname function will return the IP address corresponding to the domain name.

4. Obtain the currently visited URL

In web development, it is very common to obtain the URL address of the current page. In the ThinkPHP framework, we can obtain the URL of the current page through the following code:

$url = request()->url(true);

Among them, request() represents the request object instance, and url(true) represents obtaining the complete URL address. If no parameters are passed, only the URL path part is obtained by default, excluding domain name, protocol and other information.

5. Summary

In the ThinkPHP framework, it is very simple to obtain the request IP address, the client's real IP address, the server IP address and the currently visited URL. Through the above code, we can easily obtain this common information, which provides convenience for our web development work.

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