Method Crypto.Substitution()->set_null_chars()
- Method
set_null_chars
 this_programset_null_chars(int|floatp,array(string)chars)- Description
 Set null characters (fillers). Characters from
charswill be inserted into the output stream with a probabilityp.- Parameter 
p A float between 0.0 and 1.0 or an integer between 0 and 100.
- Parameter 
chars An array of one character strings.