Answers for "laravel 8 validation unique many columns rule"

laravel unique validation on multiple columns

'mobile_no' 
  => 'unique:users,mobile_no,NULL,id,country_id,'.request('country_id');

laravel 8 validation unique 2 columns

// in my case, just add more unique rule
'phone1' =>'string|unique:tbl_users,phone1|unique:tbl_users,phone2|different:phone2|min:2',
'phone2' =>'string|unique:tbl_users,phone2|unique:tbl_users,phone1|different:phone1|min:2',