foreach (@date){
# create hash reference variable for user inputs as well as every date in array @date
$user_input->{pp_branch} = param('pp_branch');
$user_input->{host_name} = param('host_name');
$user_input->{controller} = param('controller');
$user_input->{start_date} = ;#I wann assign here each element of array unless the array gets empty;

# .... some code..........
}