Check if the variable is empty - php

Question

What I want is to check if the columns $campo01 and $campo02 are empty or not, if not empty it displays on my page, the problem is that if a variable is empty it does not display the result of the variable that is not empty
class Test extends URLDynamic
{
public function Testando( $campo01, $campo02, $linguagem, $audio )
{
$CRUD = new CRUD;
$this->SetParametro();
$VerificaAudio = $this->SelectDados(
"campo01, campo02",
"table_01",
"WHERE mCat = ? AND mSlug = ? AND mStatus = ?",
array ( $this->SepURL[0], $this->SepURL[1], 1 )
);
foreach ( $VerificaAudio as $VerificouAudio ) {
$campo01 = $VerificouAudio['campo01'];
$campo02 = $VerificouAudio['campo02'];
if ( empty ( $campo01 ) ) {
echo 'Empty Campo 01';
} elseif ( empty ( $campo02 ) ) {
echo 'Empty Campo 02';
} else {
// Returns the value of each column.
echo $linguagem;
$Temporadas = $this->SelectDados(
"*",
"table_02",
"WHERE mCat = ? AND mSlug = ? AND tAudio = ? AND tStatus = ?",
array ( $this->SepURL[0], $this->SepURL[1], $audio, 1 )
);
} // end else
} // end foreach
}
}
$Test = new Test;
$Test->Testando( "Legendado", "Legendado" ); // campo01
$Test->Testando( "Dublado", "Dublado" ); // campo02

Answer 1

class Test
{
public $Teste01;
public $Teste02;
public function Testando($Param01, $Param02)
{
$this->Teste01 = '';
$this->Teste02 = 'Has value';
echo $this->checkIfEmpty($this->$Param01);
echo $this->checkIfEmpty($this->$Param02);
}
private function checkIfEmpty($var)
{
if (empty($var)) {
return 'Empty';
} else {
return $var;
}
}
}