I'm using a php library.
It has a class with a method that takes as parameter exactly this text that I will write: TextElementInterface $pText = null . In the definition of TextElementInterface it is an interface.
How do I pass this via parameter? for example if it was a class it was just instantiate to assign it to a variable and pass that variable by parameter in the desired method, but an interface I do not know how to do?
Well, in this case this signature is forcing the last value to implement the TextElementInterface interface. The example below is very simple, but I believe it is appropriate for the question:
<?php
interface TextElementInterface
{
public function __construct($pText);
}
class ImplementaInterface implements TextElementInterface
{
public function __construct($pText) {
return $pText;
}
}
class MinhaClasse
{
public function chamarMetodo(TextElementInterface $pText = null) {
echo "Opa! Funciona.";
}
}
$obj = new MinhaClasse;
$obj->chamarMetodo(new ImplementaInterface('Qualquer coisa aqui'));
Note that I passed as new ImplementaInterface('Qualquer coisa aqui') parameter, this class is implemented in the interface ** TextElementInterface **.
If you try something like: $obj->chamarMetodo('Qualquer coisa aqui'); you will see that an error occurs because the interface is not being implemented.