I can't solve this exercise.
I think everything's ok, I can see the printed words on the right but when i click on save and submit this message appears :
"Oops, try again. Did you remember to print your name in UPPERCASE?"
I don't know why!
<?php $name = "Cristina"; $partial = substr($name, 0, 4); print $partial; $lowercase = strtolower($name); print $lowercase; $uppercase = strtoupper($name); print $uppercase; ?>