simple php explanation.. what's the difference between the arrow operators?

Question

I'm unfamiliar with exact differences between these two operators:

->

and

=>

Are there many differences? One assigns an array, and the other just renames or something to that effect?

Answer 1

-> is a method call or property call operator, and => is an array assigning operator

$foo = new Bar();
$foo->test();
// or even
$foo->bar = 'baz';

// vs 

$foo = array(
    'bar' => 'test'
);

// And wrapping it all together!!!
$foo = new Bar();
$foo->baz = array( 'bar' => 'baz' );

Answer 2

-> is a this operator which is used for accessing class properties whereras

=> is a used for arrays

Answer 3

-> is used to access a property of an object where as => is used to marry a array key up with its value during assignment.