In both statements you can find a difference:
String 1: his can be save to database
String 2: this can't be save to database
can't
in statement 2 is having a single quote. And this single quote is terminating the sentence there itself. So, it is unable to save two values(i.e.
this can
and
t be save to database
) in database.
Try this text:
this can''t be save to database
--Amy