<?php
    // First variant to say "Hello, PHP!"
    $helloPHP="Hello, PHP!";
    echo "<div>$helloPHP</div>";

    // Second variant to say "Hello, PHP!"
    $hello = "Hello";
    $devider = ",";
    $php = "PHP";
    $exclamationMark = "!";

    $fullSentence = $hello . $devider . ' ' . $php . $exclamationMark;
    echo $fullSentence
?>