<?php opens the script. echo writes. // comments.

Goal

Echo three lines, including a comment.

<?php
echo "Hello, PHP", PHP_EOL;
echo "Swiftener playground", PHP_EOL;

<?php
// ignored
echo "Ada", PHP_EOL;
echo "Alan", PHP_EOL;

<?php
$city = "Nairobi";
echo "printed: ", $city, PHP_EOL;

<?php
echo 1 + 2, PHP_EOL;
echo "1" . "2", PHP_EOL;