Fatal error: Call to undefined method Membres::mailactivation()

<?php
class Membres{ 

private $toto;

function __construct($m){
$this->toto[0] = $m[0]; /*titi*/
$this->toto[1] = $m[1]; /*quesaisje*/
$this->register($this->toto[0]);
}


function register($t) { 
$this->mailactivation($this->toto[1]); 
} 

function mailactivation($cle) { 

$mail='toto@free.fr';
$Mailtexte='te';
//echo $this->sendmail('noreply@site.com','site.com',$mail,'site.com : Activation de votre compte',$Mailtexte); 
echo 'noreply@site.com','site.com',$mail,'site.com : Activation de votre compte',$Mailtexte; 
} 

} 



$emailcode='quesaisje';
$membre=array('titi',$emailcode);
$test = new Membres($membre);
?>

<?php
class Membres2{

private $password;
private $email;
private $pseudo;
private $cle;


function __construct($password,$email,$pseudo,$cle){ 

$this->password = $password; 
$this->email = $email; 
$this->pseudo = $pseudo; 
$this->cle=$this->Register($this->password,$this->email,$this->pseudo); 

/*c'est deux methodes tu peux les appeler depuis register
si register ok 
//$this->login($this->pseudo,$this->password); 
//$this->mailactivation($this->cle); 
*/
} 

function Register($password,$email,$pseudo) { 
echo $password = strtolower($password); 
echo $email = strtolower($email); 
echo $pseudo = strtolower($pseudo); 
echo $password = md5($password); 
/*
$pseudo = Secure::Crypter($pseudo,$this->Cle); 
$email = Secure::Crypter($email,$this->Cle); 
$emailcode = Secure::coderand(19); 
$ip = crypt($_SERVER['REMOTE_ADDR'],'CRYPT_SHA512'); 
$reponse = crypt($reponse,'CRYPT_SHA512'); 
$Requete="INSERT INTO table( pseudo, password, email , emailcode , ip ) VALUES ('$pseudo', '$password', '$email', '$emailcode', '$ip');"; 
echo $Requete; 
if(Mysql::MyQuery($Requete)){ 
$this->mailactivation($cle); 
$this->login($this->pseudo,$this->password); 
}else{
}
*/
}

}


//$membre=array('titi','titi@free.fr','toto','123');
$test2 = new Membres2('titi','titi@free.fr','toto','123');
?>

<?php
class Affichage{

private $mavarprivee;
public $resultat;
public $resultat2;

  function __construct($valeur){
  $this->mavarprivee=$valeur;
  /*j'appelle affichera*/
  $this->affichera($this->mavarprivee);
  }
    
  public function affichera($affichemoi){
  $this->resultat=$affichemoi;
  /*j'appelle ecritGrand*/
  $this->ecritGrand($this->resultat);
  }
  
  public function ecritGrand($affichemoi){
  $this->resultat2=strtoupper($affichemoi);
  }
  

}

$ex='toto';
$test = new Affichage($ex);
echo $test->resultat;
echo $test->resultat2;
echo $test->mavar;/*ici privee pas accessible donc une erreur Notice: Undefined property: Affichage::$mavar in C:\wamp\www\cod57\activate\ex.php on line 31*/
?>