<?php
class Classe {
 
 
    function __construct($meEscreveAiPfvr) {
        $this->meEscreveAiPfvr = $meEscreveAiPfvr;
    }
 
    public function mudaOQueVaiEscreverAiMano(string $meEscreve = 'Não sei de nada') {
        $this->meEscreveAiPfvr = $meEscreve;
        return $this;
    }
 
    public function escreveAe() {
        return $this->meEscreveAiPfvr;
    }
 
}
 
class classeExtendida extends Classe {
 
 
    public function __construct($meEscreveAiTambem) {
        parent::__construct($meEscreveAiTambem);
    }
 
}
 
$classe = new Classe('queria saber o que esta acontecendo');
echo $classe->meEscreveAiPfvr;
 
echo ' |-| ';
 
$classeExtendida = new classeExtendida('Eu também queria saber o que esta acontecendo');
echo $classeExtendida->meEscreveAiPfvr;
 

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