['09:00', '17:30'],
'Tuesday' => ['09:00', '17:30'],
'Wednesday' => ['09:00', '13:00'],
'Thursday' => ['09:00', '20:00'],
'Friday' => ['09:00', '17:30'],
'Saturday' => ['10:00', '16:00'],
'Sunday' => null,
];
// 4. A function with type declarations. htmlspecialchars() escapes <, >, &
// and quotes, so text from visitors can't inject HTML or scripts (XSS).
function h(string $text): string
{
return htmlspecialchars($text, ENT_QUOTES | ENT_HTML5, 'UTF-8');
}
// 5. Input from the address bar (?name=Ada). ?? supplies a default when the
// key is missing, as it always is on the command line.
$name = trim((string) ($_GET['name'] ?? ''));
$greeting = $name === '' ? 'Welcome' : "Welcome, {$name}";
// 6. Dates: name the time zone rather than relying on the server's setting.
$now = new DateTimeImmutable('now', new DateTimeZone('Europe/Amsterdam'));
$today = $now->format('l');
// 7. The closing tag: PHP stops here and the HTML below goes out as is.
?>
<?= h($title) ?>
is shorthand for */ ?>
for the week. Today is .
Generated by PHP at format('H:i')) ?> (Amsterdam time).