Validate::Tiny 1

gistfile1.pl

my %rules = (
    fields => [ 'name', 'email', 'pass' ],    # What fields
    filters => [
        name  => sub { ... },                 # Filter name
        email => sub { ... },                 # Filter email
        pass  => sub { ... }                  # Filter pass
    ],
    checks => [
        name  => sub { ... },                 # Check if name is good
        email => sub { ... },                 # Check email
        pass  => sub { ... }                  # Check password
    ]
);