Laravel eloquent change attribute by field name - php

Question

My model structure after model -> find($id);
protected 'attributes' =>
array (size=35)
'id' => string '1234134' (length=6)
'case' => string '123123' (length=7)
I want to update this model like this
foreach($input as $key => $value){
var_dump($key);
$case->($key)= $value;
}
$case -> save();
I tried like this but doesn't work
$reflection = new \ReflectionClass($case);
foreach($input as $key => $value){
var_dump($key);
$reflection->"$ke"y;
}

Answer 1

The following code should work.
$reflection = new \ReflectionClass($case);
foreach($input as $key => $value){
var_dump($key);
$reflection->{$key} = $value;
}
$case->save();

Answer 2

if this is a laravel eloquent model, you could utilize the use of the fill method.
$case->fill($input);
$case->save();

Answer 3

It seems like your syntax is a bit off, try this:
foreach($input as $key => $value){
$case->{$key} = $value;
}
$case->save();

Answer 4

Your problem is that you are trying to access a property of the object in a way that PHP is not supporting.
To access a property of the object by using a variable containing it's name you need to use string interpolation. Wikipedia - String Interpolation
you can achieve this by using curly brackets {} instead of round brackets ()
You can fix your example like this:
foreach($input as $key => $value){
$case->{$key}= $value;
}
$case->save();
By the way in PHP this can be achieved almost like in your second example but without the double quotes
foreach($input as $key => $value){
$case->$key= $value;
}
$case->save();
I personally prefer using curly brackets as it's showing more clearly that I'm using the string value of the variable.