Check if there is internet connection php

Php check internet connection using php code example

Similarly, phone carriers have a big list of reserved IP addresses. Browser might know connection type and you might be able to get that information using client side scripts (i.e. javascript) or plugins.

How to detect internet speed in PHP?

This might not be completely what you’re looking for (read the bold part), but I doubt if anything else is possible.

This script sends 512 KB of HTML comments to your client. Parsing that HTML may add to the total transfer time, so don’t take this as your raw download speed.

Quoted from: PHP Speed test

 $time = explode(" ",microtime()); $finish = $time[0] + $time[1]; $deltat = $finish - $start; echo "-> Test finished in $deltat seconds. Your speed is ". round($kb / $deltat, 3)."Kb/s"; ?> 

For example by timing AJAX request on client side. That way you can figure approximate download speed, but not upload. For uploading, sending large AJAX POST request can handle it.

With jQuery and $.ajax it’s pretty trivial to do.

How to check if internet is connection in php Code, $response = null; system(«ping -c 1 google.com», $response); if($response == 0) < // this means you are connected >

Detect user connection 3g,4g,wifi or lite by using php

You can sometimes tell the difference between WIFI and non-WIFI, and sometimes you can’t tell any difference.

You can never tell the difference between 3G/4G/LTE with php.

Assumptions and terminology

I am assuming that a smartphone is connecting to your HTTP server via a browser, and your server uses PHP to handle the request. If that is not the case, please clarify your question.

Terminology: I will use the word «ISP» to refer to companies which provide Internet service but are not phone carriers.

What info does the server get?

When your device connects to a PHP server, it tells the server some info about itself, the server can know the device’s IP address, user agent, etc.

The problem

The problem is that the browser «Doesn’t care» what connection it is on, and it has no effect on the info the browser sends to the server. If the browser is on 3G/4G/LTE, it would send the exact same info it would have sent if it were on Wifi.

Semi «Proof»: The HTTP protocol which transfers the data from the device to the HTTP server is completely ignorant of the underlying network stack.

How do we identify the connection, then?

The only difference between a Wifi/Non-Wifi is: The IP address.

ISP’s have a big list of reserved IP addresses. If you can detect that this IP address belongs to a particular ISP, this must be a Wifi connection.

Similarly, phone carriers have a big list of reserved IP addresses. If you can detect that this IP address belongs to a particular phone carrier, this must be a 3G/4G/LTE connection!

Doing it in practice

We need to somehow correlate each IP address to an ISP/Carrier, one way to do this is to have a huge database of all ISP’s / Carriers and their respective reserved IP’s. In practice, a simple WHOIS lookup can reveal the source.

For example, a WHOIS lookup for a random IP: 109.168.97.31 revealed among other things:

Netvision is an Israeli Internet provider. Therefore, if this is a phone connection (You can check that using the user-agent), this must be a Wifi connection!

Doing it in PHP

I have a little knowledge of PHP, perhaps someone with better knowledge will better edit this section. The code probably goes like this:

$company_name = geoip_isp_by_name($_SERVER['REMOTE_ADDR']); $this_is_a_wifi_connection = is_this_wifi($company_name); 

The function is_this_wifi should lookup the company name in a database and decide whether this is a phone carrier or an ISP company.

• You still need to have a list of ISP’s / Carriers in order to compare your WHOIS lookups with them.
• Some people use VPN’s / Anonymity networks, an IP address can lie.
• Some companies are both ISP’s and carriers, you will never know whether or not it’s a Wifi connection in such a case.

One somewhat possible solution is using geoip_isp_by_name php function to get the name of ISP and then through some API or scraping check what technologies this ISP is offering.

It’s not possible in PHP or any other server side language. You have to get that kind of information from client (browser) and currently there is no standard HTTP header which browsers can use it to pass connection type information (List of HTTP header fields).

Browser might know connection type and you might be able to get that information using client side scripts (i.e. javascript) or plugins.

Php check internet connection Code Example, “php check internet connection” Code Answer’s. php check internet connection . php by Underlyingglitch on Apr 08 2020 Comment . 1 Source: stackoverflow.com. php check internet connection geoip php sample; php get location from ip address; how to create cookie in php; php get url path name;

How to determine that application is running on internet or intranet using php script

You can use $_SERVER[«HTTP_HOST»] variable to obtain if it is localhost or other IP address.

You could check $_SERVER[‘SERVER_ADDR’] against $_SERVER[‘REMOTE_ADDR’] If the first number of the IP is the same and is 192,172,10 or 127 then it is most likely an intranet page.

this can be improved upon a bit using the rules here: http://en.wikipedia.org/wiki/Private_network

PHP connection_status() Function, The connection_status() function returns the current connection status. Possible values that can be returned are: 0 — CONNECTION_NORMAL — connection is running normally; 1 — CONNECTION_ABORTED — connection is aborted by user or network error; 2 — CONNECTION_TIMEOUT — connection timed out; 3 — …

Is there a way to detect if a user is on a wifi connection with php or javascript?

There are two ways to do this that I know of:

1. Check the IP against a database. This option gives you much more than carrier information, by the way. It can also give you the location and name of the ISP, the domain that maps to this IP, lat/long, zip code, time zone, etc., etc. Look at http://www.quova.com/ for a RESTful API that allows this.
2. Programmatically: This only works on Android version 2.2+. It is a simple check for navigator.connection. Hope this helps. Here is a test page:

No, there isn’t, there is nothing in the IPv4 nor the HTTP transport that even hints at what kind of connection is used, except for the underlying protocol itself, which is usually IPv4 and HTTP.

No, IPv6 doesn’t include this information either.

You can get some information concerning the user — like IP, used OS, protocol. But you are not able to fetch any information concerning the used medium the user uses to connect to the internet. There are some speed testing tools to analize the connection speed with which a user is connected, but wireless connections do not have any significant speed mark or whatever to identify it.

Is there a way to detect if a user is on a wifi connection, But you are not able to fetch any information concerning the used medium the user uses to connect to the internet. There are some speed testing tools to analize the connection speed with which a user is connected, but wireless connections do not have any significant speed mark or whatever to identify it.

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Check internet connection in PHP

In this article, we will discuss various methods in PHP to check the internet is present or not. We are going to create the scripts using predefined as well as user-defined methods to check internet connection in PHP.

How to check internet connection in PHP with predefined methods?

PHP offers a predefined method known as connection_status() that returns the state of the internet connection such as-

Let us create the script using connection_status() method,

 //display connection status echo $msg; ?>

Output :-

You are connected to internet.

How to check internet connection with user-defined methods?

This is the less effective way than the predefined methods and it involves the methods that use the ping methods to determine whether the internet connection is available or not. It usually tries to access a website and decide the status of the internet on the basis of that.

Let us create a PHP script using @fsockopen () method,

 //test with a website $domain="http://170.187.134.184"; //verify whether the internet is working or not if (check_internet($domain)) < echo "You are connected to the internet."; >else < echo "You seem to be offline. Please check your internet connection."; >?>

Output :-

You are connected to the internet.

Let us create another PHP script using @fopen() method,

Output :-

You are connected to the internet.

In the above ways, we can determine whether the internet connection is available or not usning PHP. If you have any doubt comment below.

2 responses to “Check internet connection in PHP”

I tried to use this code but when I try to open the page without internet connection. It says, no internet

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Check If Internet Connection Exists Or Not Using JavaScript & PHP

Hi! Today let’s see how to check if internet connection exists or not using javascript and php. The network connection may fail at times and many web applications require internet connection all the time. Hence, if there is no internet, these apps won’t function properly. In such case, checking the status of the network through programming would be useful. There are many ways to do it, but here I’ll show you the simplest method of all to detect whether user is online or offline both from client (using javascript) and server side (with PHP).

Check Internet Connection using JavaScript:

JavaScript has a function called navigator.onLine. This browser property can be used to determine if you are connected to the internet. It returns true or false depending on the status of the client’s network and says whether the browser is online or offline easily.

Below is the JS function to verify connectivity to the Internet.

JS Function:

Function Usage:

Call the chkInternetStatus() function on button click and it will return the network status.

Check Internet Connection 

Using SetInterval Function:

There is an even better method to check internet. You can use the setInterval() function to find the status of the network automatically at a certain time interval. Therefore, as soon as the network gets disconnected, the user will be notified immediately.

Using the above methods you can check internet connection from the client side. Now let’s see how to do it on the server side.

Check Online/Offline Status using PHP:

To check the internet connectivity in PHP, you can establish some socket connection and know the network status. If you are able to access specific web resource, it means you are connected to internet and not otherwise.

Here is the php snippet to detect if internet is working or not.

In the above code, we used a fsockopen() function. This initiates a socket connection to the given host (here it is ‘google.com’) and returns true if the server is reachable and false if it cannot.

Likewise you can check if the internet connection works or not in javascript and php. When things go wrong just because of net connection, it is better to notify users and let them fix it as soon as possible. This will also help improve the user experience. I hope you like this post. Please don’t forget to share it in social networks.

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