empty array outside function and array is ok inisde - php

Question

I'm having problems getting my array values outside a function and from another file.
Inside the array and function i have this, those values are defined with getters and setters
Array ( [0] => XXXXXXXXXX [1] => 5ºA )
Those values are defined by setters and they working since i have the values with print_r
public function getTurmaeProfessor(){
global $myArr;
$myArr[] = $this->getProfessor();
$myArr[] = $this->getTurma();
print_r($myArr);
return $myArr;
}
Now from another file i use this
$dados = $esmaior->getTurmaeProfessor();
if(!$dados){
echo "sem dados";
}
print_r($dados);
And the result is empty, so the array is empty...why??
Thanks
UPDATE
This function is called here
$this->setTurma($nome_turma);
$this->setProfessor(($nome_professor));
$this->getTurmaeProfessor();
So if a put this
public function getTurmaeProfessor(array $myArr)
I'm gonna need to change the call method...how to do it??
UPDATE 2
Ok...
Let me put all maybe it's better to understand.
My main function is this one
public function novaAula($atividade, $turmas, $local, $dataAula, $inicio, $fim, $fundamentacao, $observacoes, $id_professor){
try{
$stmt = $this->db->prepare("INSERT INTO `aulas_exterior` (`atividade`,`id_turma`,`local`,`data_aula`,`inicio`,`fim`,`fundamentacao`,`observacoes`)
VALUES (:atividade,:id_turma,:local,:data_aula,:inicio,:fim,:fundamentacao,:observacoes);");
$stmt->bindparam(":atividade", $atividade);
$stmt->bindparam(":local", $local);
$stmt->bindparam(":data_aula", $dataAula);
$stmt->bindparam(":inicio", $inicio);
$stmt->bindparam(":fim", $fim);
$stmt->bindparam(":fundamentacao", $fundamentacao);
$stmt->bindparam(":observacoes", $observacoes);
$turma = explode(',', $turmas);
foreach ($turma as $id_turma) {
$stmt->bindParam(':id_turma', $id_turma, PDO::PARAM_INT);
$result = $stmt->execute();
$idAula = $this->db->lastInsertId();
$this->insertPedidoByLastId($idAula,$id_professor, $id_turma);
$nome_turma = $this->getTurmaById($id_turma);
$nome_professor = $this->getNomeById($id_professor);
$this->setTurma($nome_turma);
$this->setProfessor(($nome_professor));
$this->getTurmaeProfessor();
}
if (!$result) {
print_r($stmt->errorInfo());
return array('status' => 'error', 'message' => 'Problema ao gravar esta nova atividade...');
}
else{
return array('status' => 'success', 'message' => 'O pedido foi criado com sucesso...');
}
} catch (Exception $ex) {
echo $ex->getMessage();
}
}
and as you can see i'm setting these 2
$this->setTurma($nome_turma);
$this->setProfessor(($nome_professor));
and finally i call the method
$this->getTurmaeProfessor();
Entering this function i want to have names from those 2 setters
public function getTurmaeProfessor(array $myArr){
$myArr[] = $this->getProfessor();
$myArr[] = $this->getTurma();
return $myArr;
}
Until now...everything is working....the problem is when i'm trying to get the return in other file...i receive empt...why??

Answer 1

Do not use global. Fix your function to accept arguments:
public function getTurmaeProfessor(array $myArr){
// remove global $myArr;
....
return $myArr;
}
optionally (but I do not recommend it unless you know you want to go that way) pass your array by reference:
public function getTurmaeProfessor(array &$myArr){
// remove global $myArr;
// no return this time needed
}
Now, since getTurmaeProfessor() requires argument you must change all the invocations to do that, i.e.
$dados = $esmaior->getTurmaeProfessor($myArr);