PHP

PHP (PHP: Hypertext Preprocessor) is a scripting language used primarily in server-side solutions for creating dynamic web pages.

To write the code we can use Notepad++

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<!DOCTYPE html>
<html>
    <head>
        <title>PHP tervitus</title>
    </head>
    <body>
    <h1>PHP tervitus</h1>
    <!--php koodi osa-->
    <?php
     
    echo "Tere hommikust!";
    $tekst = "TARpv22";
    echo "<br>";
    echo $tekst;
     
    //matemaatika tehed
    $arv1 = 10;
    $arv2 = 12;
     
    echo "<br>";
    echo "Liitmine: ".($arv1+$arv2);
    echo "<br>";
    echo "Lahutamine: ".($arv1-$arv2);
    echo "<br>";
    echo "Korrutamine: ".($arv1*$arv2);
    echo "<br>";
    echo "Jagamine: ".($arv1/$arv2);
    echo "<br>";
    echo "Arv1 ruudus: ".pow($arv1, 2);
    echo "<br>";
     
    ?>  
    </body>
</html>
Must be blue, meaning saved and file type is .php

ie after htdocs

http://localhost/ your folder name