after uploading the sessionTest.php file, you need to browse to it in your web browser.
When the page first loads, it will show that the value of the session variable named Test is equal to "NULL".
Click on the first link, this should change the Test session variable value to "Test"
Click on the second link to reload the page.
If the value of the test session variable remains "Test", that means session management is functioning correctly.
If the value of the test session variable changes back to "NULL". the test fails.
most likely it is a problem with the session.save_path setting in the php.ini file. you will need to contact the host to have them correct the problem.