Best way is NOT to use Integer as a fieldname. It is bad praxis. But if you need, you should access the database with raw method:
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public function show() { $tests = DB::table('test') ->select("22 as twentytwo") ->get(); foreach($tests as $test){ Log::info($test->twentytwo); } }
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insert and update like this

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$obj=new Modelname(); $myfield = 22; $obj->$myfield="anything";
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Best way is NOT to use Integer as a fieldname. It is bad praxis. But if you need, you should access the database with raw method:
public function show() { $tests = DB::table('test') ->select("22 as twentytwo") ->get(); foreach($tests as $test){ Log::info($test->twentytwo); } }