How to encode cyrillic characters for URL and then decode them?

Question

I have a form on one page:

One of the input fi

Answer 1

A solution that preserves the + and any other character in the original string:

my $s = '%41F%2F%424+%41F%41E%414%416%410%420%41A%410+%418%417+%421%412%418%41D';
$s =~ s/%([[:xdigit:]]+)/chr(hex($1))/eg;
print $s;

Result:

П/Ф+ПОДЖАРКА+ИЗ+СВИН