# Exactly equivalent drop-in replacement
sub get_my_params {
    map { defined param( $_ ) ? param( $_ ) : '' } qw(
        ticket title client next_step o_date o_time
    );
}

##</code><code>##

# Returns a hash, not an array
sub get_my_params {
    map { $_ => defined param( $_ ) ? param( $_ ) : '' } qw(
        ticket title client next_step o_date o_time
    );
}

# Use this one as so:
my %params = get_my_params();

if ( $params{ title } ne '' ) {
    # Do stuff here.
}