The best way to declare a private variable in a PHP Class is to create them above the __Construction method, by convention you may start the variable with an underscore after the dollar sign (i.e $_private_variable) to let other programmers reading your codes know at sight that it is a private variable, brilliant!
Private and protected properties can be accessed by ReflectionProperty::getValue() right away. Previously, they needed to be made accessible by calling ReflectionProperty::setAccessible(); otherwise a ReflectionException was thrown.
The private keyword is an access modifier. It marks a property or method as private. Private properties and methods can only be used by the class in which the property or method was defined. Derived classes and outside code cannot use them.
In PHP, when a property or method is marked private, it can only be accessed from within that class. That includes other instances of the same class. This may seem counter-intuitive at first, because we are used to dealing with instances of classes.
You can access the properties of an object in JavaScript in 3 ways: Dot property accessor: object.property. Square brackets property accessor: object['property'] Object destructuring: const { property } = object.