To keep the old correct values in the form input after validation wrong values should removed or stays same on form submit

[u.verma.extern]

I want to keep the validated value in the form and remove the wrong ones after submitting the form in OXID Eshop or Smarty Template Engine. Just we’ve functionality in laravel (refer this link - validation - What is the best practice to show old value when editing a form in Laravel? - Stack Overflow )
Whole form input get blank if there is any input is not validated. And I have to entered all values again.

Any one can help would be highly appreciated. Thanks