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Legacy code is valuable, has proven itself over many years, but is usually not sufficiently tested. How can we change that?

Learn Web Design & Development with SitePoint tutorials, courses and books - HTML5, CSS3, JavaScript, PHP, mobile app development, Responsive Web Design

Find errors before your program is executed! Modern development tools will help you.

May 21, 2025 - PHP is used on 77.6% of websites, so if you're interested in web development, PHP is certainly worth learning. In this post, we’ll help you do just that.

Improve your development process! Learn best practices for Git and common problems in everyday programming.

PHPUnit offers flexible options for structuring a test suite. Which one is right for your project?

Discover the secrets of PHP debugging and master powerful techniques for your projects.

Software testing comes in many shapes and sizes. Which ones are right for your project?

Here you will learn how database interaction can be implemented in a testable manner and how it can be tested.

Tests can be misleading and give a false sense of security. Thanks to feedback from PHPUnit, you can handle these risky tests correctly.

Maintainable software is future-proof. Testing is important for this, of course. But what makes code testable?

Learn about PHP, a programming language used in modern web development, and build a strong foundation in PHP by learning about basic syntax.

PHP is an incredibly popular programming language. Statistics say it’s used by 80% of all websites. It’s the language that powers WordPress, the widely...

How do we handle code dependencies when testing? Here you will learn everything about test stubs and mock objects.

Kickstart your Laravel journey with free mini video courses. Learn PHP fundamentals and Laravel basics through bite-sized lessons and real-world projects.

Learn how to use for-loops and while-loops to execute the same code multiple times.

When testing code, we also have to work with randomness and time. How do we do this correctly?

See how to learn PHP, including to consider training courses, bootcamps, books, and other PHP training options to learn PHP from beginner to advanced skills.

Symfony Community is a passionate group of over 600,000 developers from more than 120 countries, all committed to helping PHP surpass the impossible.

Start your journey into server-side development by learning PHP. Essential for web developers who want to build robust and efficient server-side applications....

Learn how to handle HTML forms and validate user data before storing it in a database.

Test code must be clean, too! Today, we are improving the quality of your tests.

Successful test automation in everyday projects, with solutions for even the trickiest of problems.

Make code reliable with PHPUnit. Whether written by humans or AI.

New year, new PHP version! Here you will learn all the relevant improvements.

Learn best practices for dealing with dependencies so that updates no longer scare you.

The standard functionality of PHPUnit is often sufficient. You can adapt it to your needs with extensions.

Develop software goal-oriented! The proven method of test-driven development (TDD) will help you.