PHP Using classes

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PHP: Static and non Static functions and Objects
In PHP, whats the difference between :: and -> ?

I have seen different ways to use classes in PHP eg

$myclass->method()

or

MyClass::method()

what is the difference?

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From your example, $myclass appears to be an instance of the class MyClass and you are invoking an instance method. Instance methods are invoked from instances of a class.

In the second example, method appears to be a static method of the class. A static method is invoked at the class level, no instance is necessary.

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The first is calling method from an object, so you would have done $myclass = new MyClass() , the constructor ( __construct() ) was called, etc.

The second one is a static call: no object is instantiated, and it cannot use $this references. Static variables are the same all over the place btw, while non-static variables are specific to the object they're in.

Although the question is closed, you might find some good info on static here: https://stackoverflow.com/questions/3090994/what-does-the-static-keyword-mean-in-oop

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To be able to use $myclass->method() you first have to create an instance of the class.

$myclass = new myClass();

The second is used to access the moethod without first creating an instance.

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