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install apache
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apt install apache2 -y
Install php7.4 version

Steps to install PHP 7.2 on Ubuntu 22.04 LTS server or desktop
The steps given here can also be used for other Linux distros based on Ubuntu 22.04 LTS such as POP OS Linux, Linux Mint, Elementary OS, and more…
1. Run system update
Our system must be in its latest state to avoid any package conflict. Hence, before going further, let’s first run the system update command to ensure all the available security updates are on our Ubuntu.
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sudo apt update && sudo apt upgrade
2. Add Ondrej PPA Repository on Ubuntu 22.04
We cannot install the PHP7.4 packages using the default system repository of Ubuntu 22.04 because the default version of PHP present to install in this Ubuntu version is PHP 8.1. Hence, to get the older version, add the PPA repository called Ondrej.
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sudo apt install software-properties-common
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sudo add-apt-repository ppa:ondrej/php -y
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3. Install PHP 7.4 on Ubuntu 22.04
Now, we can install PHP7.4 on our Ubuntu 22.04 Linux, however, we need to mention the version number with the command otherwise the system will install the php8.1 on our system. Here are the commands to follow:
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sudo apt install php7.4
For Common Extensions you can use:
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sudo apt install php7.4-{cli,common,curl,zip,gd,mysql,xml,mbstring,json,intl}
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4. Set PHP7.4 as the default version
Note: This step is only needed by those who are using two versions of PHP. For example, on Ubuntu 22.04 you are using PHP 7.4 and PHP 8.1 both. Hence, to make one of them as system’s default version we can use the update-alternatives command:
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sudo update-alternatives --config php
Enter one of the “Selection” numbers of the listed PHP version that you want to make the system’s default one. For example, here 7.4 is at 1 number, hence we have typed the same followed by pressing of the “Enter” key.
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Install lightweight PHP service on the computer to handle MAC Address reading

It will open your directory root folder windows and should only have 1 file called "index.php".
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cd /var/www/html/
Command to generate the php file
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nano /var/www/html/getmac.php

Once you have the file open, copy the following code into the "getmac.php"

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language	php
linenumbers	true

<?php
header('Access-Control-Allow-Origin: *');
$Result = array("STATUS" => "", "MAC_ADDR" => "");
function ReadMacAddressWinCommand()
{
    global $Result;
    if (strtoupper(substr(PHP_OS, 0, 3)) === 'WIN') {
        $GetMacResult = exec('getmac /fo csv /nh | findstr /V /R /C:"disconnected"') or die("UNABLE_EXEC_GETMAC_CMD");
        if ($GetMacResult != "") {
            // First see if can explode out \n and or \r\n
            $ConnectionResults = explode("\n", $GetMacResult);
            // ONLY USe first connection;
            $ActiveConnectionFirst = $ConnectionResults[0];
            // Get Only MAC Address;
            $ConnectionInfo = explode(",", $ActiveConnectionFirst);
            // MAC ADDRESS TAKE OUT "
            $ActiveMacAddress = str_replace('"', '', $ConnectionInfo[0]);
            //
            if ($ActiveMacAddress != "") {
                $Result["STATUS"] = "OK";
                $Result["MAC_ADDR"] = $ActiveMacAddress;
            }
        } else {
            $Result["STATUS"] = "CANNOT_GET_MAC_ADDRESS";
        }
    } else {
        $Result["STATUS"] = "NOTN_WIN_SYSTEM";
    }
}
if (isset($_REQUEST["CMD"]) && $_REQUEST["CMD"] == "GETMAC") {
    // First test read a fixed txt file
    $FixMacAddressFile = "./StationMacAddress.txt";
    $MacAddressFile = fopen($FixMacAddressFile, "r");
    if ($MacAddressFile) {
        $MacAddressFixed = rtrim(fread($MacAddressFile, filesize($FixMacAddressFile)));
        fclose($MacAddressFile);
        if (preg_match('/^(?:(?:[0-9a-f]{2}[\:]{1}){5}|(?:[0-9a-f]{2}[-]{1}){5}|(?:[0-9a-f]{2}){5})[0-9a-f]{2}$/i', $MacAddressFixed) == 1) {
            $Result["STATUS"] = "OK";
            $Result["MAC_ADDR"] = $MacAddressFixed;
        } else {
            ReadMacAddressWinCommand();
        }
    } else {
        ReadMacAddressWinCommand();
    }
}
echo json_encode($Result);

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Copy from here and right click to paste in terminal

Save the file
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Press keyboard: Ctrl + X >>>>> enter : Y >>>>>>>>>>> Press : Enter
Now chekc the MAC address for this computer first , and you can follow command
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ip addr show
Example: after command will show this:: (Green colour line is MAC Address of this computer)
Select the mac address (select and mark is copy in ubuntu function): 08:00:27:ef:a5:70

Now create another file called "StationMacAddress.txt" and method same point 2

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nano /var/www/html/StationMacAddress.txt

Note

a. Put in your mac address of the POS station as registered in MIN into the file (Example), make sure no "new line" after the mac address

b. Right click the mouse for paste the MAc Address to StationMacAddress.txt

Save and exist :
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Press keyboard: Ctrl + X >>>>> enter : Y >>>>>>>>>>> Press : Enter
Open the file "StationMacAddress.txt" with cat function (This step is double check the MAX A)
Image RemovedSave this text file.Address)
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Change Apache access port and method like point 2
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nano /etc/apache2/ports.conf
Note
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command # to disable original port 22

next add Listen 8888 in next line
Save and exist :
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Press keyboard: Ctrl + X >>>>> enter : Y >>>>>>>>>>> Press : Enter
Restart Apache service
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service apache2 restart
Save it and that all, you can "test" it by calling from browser: localhost:8888/getmac.php?CMD=GETMAC and should have the following screen.