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PHPUnit: The PHP Testing Framework
Getting Started with Version 9 of PHPUnit
PHPUnit Manual — PHPUnit 11.1 Manual
How to Test PHP Code With PHPUnit - freeCodeCamp.org
sebastianbergmann/phpunit: The PHP Unit Testing framework. - GitHub
A Beginner’s Guide to PHPUnit: Writing and Running Unit
PHPUnit - Wikipedia
1. Installation — PHPUnit 10.5 Manual
2. Writing Tests for PHPUnit — PHPUnit 10.5 Manual
PHP: PHPUnit – Make WordPress Core