sql - Implode separate date of birth values from php form -

ok i'm out of ideas , have reached end point in research.

have registration form birthdate select fields example below:

<div class="row">     <div class="col-xs-2">         {!! form::selectmonth('dob_month', 1, ['class'=> 'form-control']) !!}     </div>     <div class="col-xs-2">         {!! form::selectrange('dob_date', 1, 31, 1, ['class'=> 'form-control']) !!}     </div>     <div class="col-xs-2">         {!! form::selectyear('dob_year', 1930, 1997, 1991, ['class'=> 'form-control']) !!}     </div> </div> 

of course in laravel's blade template.

as can see 3 separate select forms dob_month, dob_date , dob_year , values onto mutator thats in user model

private function setdobattribute($dob){              $dobstring = ['dob_year', 'dob_month', 'dob_date'];              $this->attributes['dob'] = implode('-', array_values($dobstring));           } 

with dob sql column name.

the issue

i want capture dob_year, dob_month, dob_date structured 1997-12-01 using implode('-'array_values($dobstring)) saved database.

when go through process of signing new user error message of undefined index: dob.

now getting feeling in mutator function setdobattribute($dob) missing within function code can't seem put finger on is.

input? suggestions?

thank in advance.

use array_map may be...

private function setdobattribute($dob){   $keys = ['dob_year', 'dob_month', 'dob_date'];   $this->attributes['dob'] =      implode('-', array_map(function($key) use($dob){       return $dob[$key];     }, $keys));    return $this; }