Description:
------------
---
From manual page: https://php.net/function.property-exists
---
my php version is PHP 7.4.8 with mac env(10.15.6)

eg:
class Object {
  protected id_shop;
}

class Shop extends Object{
  
}

vardump(property_exists(new Shop(), "id_shop")); //  will return true,

it's not the same as array_key_exists.

when your code is like below, error occurs  

Class EntityMapper {
   public function setField($shop, $key, $value) {
      if (property_exists($shop,$key)) {
         $shop->{$key} = $value;  // handles public fields 
         return;
      }
   }
}