Access Modifier in PHP OOP | PHP OOP Lecture 4 | How to do this

Access Modifier in PHP OOP, Types of access modifier in PHP OOP
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PHP - Access Modifiers
Properties and methods can have access modifiers which control where they can be accessed.

There are three access modifiers:

public - the property or method can be accessed from everywhere. This is default
protected - the property or method can be accessed within the class and by classes derived from that class
private - the property or method can ONLY be accessed within the class

In the following example we have added three different access modifiers to the three properties. Here, if you try to set the name property it will work fine (because the name property is public). However, if you try to set the color or weight property it will result in a fatal error (because the color and weight property are protected and private):


Public, private and protected are called access modifiers. Just like C++, PHP also have three access modifiers such as public, private and protected. The visibility of a property, a method or a constant can be defined by prefixing the declaration with these keywords.

If the class member declared as public then it can be accessed everywhere.
If the class members declared as protected then it can be accessed only within the class itself and by inheriting and parent classes.
If the class members declared as private then it may only be accessed by the class that defines the member.


Public Access modifier:
This modifier is open to use inside as well as outside the class.



Protected Access modifier:
This modifier is open to use within the class in which it is defined and its parent or inherited classes.


Private Access modifier:
This modifier is open to use within the class that defines it. ( it can’t be accessed outside the class means in inherited class).