PHP: What is "->" and "=>"? [duplicate]

Question

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Reference - What does this symbol mean in PHP?

I've been programming with PHP for a bit now, but every once in a while I run across these two expressions:

->
=>

What are these and what do they mean/do? I don't even know what to call them in order to find out...

Answer 1

-> is used to access instance attributes of objects. It is the equivalent to the . syntax in many other languages (C, C++, Python, Javascript).

$myclass->my_instance_var;
$myclass->my_instance_method();

=> is used to map keys to values in associative arrays. It is the equivalent of : in a mapping in Python and Javascript.

$arr = Array("Hello" => "World", "Foo" => "Bar");