Fatal error: Uncaught Error: Class 'PHPUnit_Framework_TestCase' not found in E:\xampp\htdocs\vendor\ralouphie\getallheaders\tests\GetAllHeadersTest.php:3 Stack trace: #0 {main} thrown in E:\xampp\htdocs\vendor\ralouphie\getallheaders\tests\GetAllHeadersTest.php on line 3