Academy HTML CSS JavaScript TypeScript SQL MongoDB Python NumPy Pandas PHP Java C C++ C# Bootstrap Tailwind CSS jQuery React Vue.js Node.js Git
❮ ❯

PHP DateTimeImmutable

Handle dates and timezones immutably to prevent side-effect bugs.

❮ Previous Next ❯

DateTimeImmutable behaves the same as DateTime, but never modifies itself; instead, it returns a new object with the modified value, avoiding subtle mutation bugs.

Key Takeaways: PHP DateTimeImmutable

Mastering PHP DateTimeImmutable helps you write clean and reliable PHP code. Follow standard conventions, test edge cases, and keep logic simple. Try running the code example below and complete the exercises to build confidence.

PHP DateTimeImmutable Code Example

PHP 
$start = new DateTimeImmutable("2026-01-01 10:00:00", new DateTimeZone("UTC"));
$nextWeek = $start->modify("+7 days");

echo "Start: " . $start->format("Y-m-d") . "\n";
echo "Next Week: " . $nextWeek->format("Y-m-d");
Output
Start: 2026-01-01
Next Week: 2026-01-08
Run this example on your own computer. The "Get Started" lesson shows how to set it up.
Finished this lesson?
Mark it complete to track your progress.
❮ Previous
PHP cURL API Requests
Next ❯
PHP Custom Exceptions

Stuck on something?

Ask the community in the CodesInTech forum.

Need a developer?

Learning on your own is great — and when you need professional help, our team builds custom software, websites and mobile apps for clients worldwide.

Explore Our Services