Methods and $this keyword in PHP - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is a method in PHP classes?

A method is a function defined inside a class that describes behaviors or actions objects of that class can perform.

beginner

What does the <code>$this</code> keyword represent inside a PHP class method?

$this refers to the current object instance that is calling the method. It allows access to the object's properties and other methods.

intermediate

How do you call a method from inside another method in the same PHP class?

Use $this->methodName() to call another method of the same object.

intermediate

Why can't you use $this in static methods?

Static methods belong to the class itself, not to any object instance, so <code>$this</code> (which refers to an object) is not available.

beginner

Example: What will $this->name access inside a method?

It accesses the name property of the current object instance.

Inside a PHP class method, what does $this refer to?

A The current object instance

B The class itself

C A global variable

D A static method

$this always refers to the current object instance inside non-static methods.

How do you call a method named greet from another method in the same PHP class?

A greet()

B self::greet()

C $this->greet()

D ClassName::greet()

Use $this->greet() to call a method on the current object.

Can you use $this inside a static method?

A Only if the method is private

B Yes, always

C Only if the method is public

D No, because static methods do not belong to an object instance

$this is not available in static methods because they belong to the class, not an object.

What will $this->property access inside a method?

A A global variable

B The property of the current object

C A static property

D A local variable

$this->property accesses the property of the current object instance.

Which keyword is used to refer to the current object inside a PHP class?

A $this

B self

C parent

D static

$this is the keyword for the current object instance.

Explain what $this means in PHP and how it is used inside class methods.

Think about how an object refers to itself.

Describe how to call one method from another method inside the same PHP class.

Remember how you access properties with $this->property.