Para que server e quando se usa "->" este sinal em PHP?

[andre.mdsou]

Para que serve e quando se usa os simbolos -> em PHP?

$mail->Password = 'senha do email'; // PASSWORD DA CONTA DE E-MAIL !
$mail->Username = 'email'; //EMAIL

Edited August 12, 2016 at 03:39 PM by pwseo
tags code, syntax highlight.

[tiago.f]

PHP has two Object Operator namely -> and ::

-> is used when you are trying to call a method on an Instance and / or access an Instance property.

:: is used when you want to call a static method or call a parent class's version of a method within a child class.

[chbcl]

No teu caso esse sinal serve para alterares os atributos Password e Username, que nada mais são que variáveis da classe.

Por exemplo:

A classe:

class Email {
public $Username = 'anonymous';
public $Password = NULL;
public function __construct(){
	#faz qualquer coisa.
}
}

Como chama-la e definir os atributos:

$email = new Email();
$email->Username = 'guest';
$email->Password = '123asd123';