Do you know withInput() and Validation errors?

@kenjis of cause at earlier from CI 4.0 I didn't know what to do with redirect withinput back and get a specific error because of  CI documentation The global return

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redirect()->back()->withInput(); 


  was not shown any specific errors result method or how to get a specific error or succeeded reply from failed action query. So when you call this action, I totally agree with you that we should have errors resulting from the helper function than using a 

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<?= service('Validation')->listErrors() ?>

(validation) service in view or  look we see we can get an errors to list ok and how about succeded result ?? or  is it formed for only errors result???!!!

@kenjis  I truly have been using this  global CI

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redirect()->back()->withInput(); 


  with additional fourth session methods like 

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redirect()->back()->withInput()->with('danger/*success*/',/*In modal*/$this->modal->errors() /*or something else apart with modal */); 


and then

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session()->get('danger/*success*/'); / 


in a view

but I may have a view of the point that it could be good if you design a new helper function and may have a specific single error validation result perimeter or with multiple validations on its parameter something like that or  this

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redirect()->back()->withInput(); 


in  additionally, Why this

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redirect()->back()->withInput(); 


if you have an app with a bulk of routes with

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routes priority

it redirects back to an unintended route  so it's forcedly me to use

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redirect()->to(current_url())->withInput(); 


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