Spilt() and join() are two very useful functions.
Spilt() takes a regular expression and a string (split(reg_ex,string)) and looks for
all occurrences of the regular expression and the parts of the string that don't match are
returned, in sequence, in a list.
Therefore to split an input name/value pair CGI input we could do:
$cgi_pair = "name=value"; #format of input ($name,$value) = split(/=/,$cgi_pair); @cgi_list = = split(/=/,$cgi_pair);
The join() function takes two list values glues them together.