function return() {
$b = 4;
$a = 3;

return $a, $b;

}

return();

echo "A = ".$a." B = ".$b;

function retourne(&$a,&$b){
$a = $a*2;
$b =$b*3;
}

$a=1;
$b=3;

retourne($a,$b);

echo $a.'--'.$b;

<?php
function mafonction()
{
    $a = 3;
    $b = 4;
    $tableau = array($a, $b);
    return $tableau;
}

$valeurs = mafonction();
echo("A = ". $valeurs[0] ."; B = ". $valeurs[1]);
?>