Input                     Inverted                  Upper                     Lower                     Randomised               
Hello, this is a test.    hELLO, THIS IS A TEST.    HELLO, THIS IS A TEST.    hello, this is a test.    HelLO, ThiS Is a TeSt.   
Hi. Do you like this?     hI. dO YOU LIKE THIS?     HI. DO YOU LIKE THIS?     hi. do you like this?     hi. DO yoU lIKe THIS?    
Hi to the rest of PHP.    hI TO THE REST OF php.    HI TO THE REST OF PHP.    hi to the rest of php.    HI To THe resT OF phP.   
Another test message      aNOTHER TEST MESSAGE      ANOTHER TEST MESSAGE      another test message      AnotHeR TEsT mesSAGE