สอบถามผู้รู้เรื่อง switch สามารถเช็คทีละสองตัวแปรได้หรือไม่ครับ

<?php  
	$color="blue";
	$size="small";
	switch($color.$size)
    {
      case ($color == 'blue' and $size == 'small'):
        echo "blue and small";
        break;
      case ($color == 'red' and $size == 'large'):
        echo "red and large";
        break;
      default:
        echo 'nothing';
        break;
    }
?>

function testswitch($val){
switch($val)
{
case (20): echo "3" ; break;
case (30): echo "5" ; break;
case (40): echo "7" ; break;
case (50): echo "9" ; break;
case (60): echo "11" ; break;
case (70): echo "13" ; break;
case (80): echo "15" ; break;
case (90): echo "17" ; break;
case (100): echo "19" ; break;
}
}

$t1 = $_POST['t1'];
$t2 = $_POST['t2'];

echo testswitch($t1);
echo testswitch($t2);

function testswitch($val){
	switch($val)
	{
		case (20): return 3 ; break;
		case (30): return 5 ; break;
		case (40): return 7 ; break;
		case (50): return 9 ; break;
		case (60): return 11 ; break;
		case (70): return 13 ; break;
		case (80): return 15 ; break;
		case (90): return 17 ; break;
		case (100): return 19 ; break;
	}
}

$t1 = 70;
$t2 = 20;

$tt1 =  testswitch($t1);
$tt2 =  testswitch($t2);

echo $tt1+$tt2;

<?php
$case1=2500; $case2=2;
switch(true){
case ($case1==120 && $case2==1 ): echo '1:', $case1, '-', $case2; break;
case ($case1==200 && $case2==2 ): echo '2:', $case1, '-', $case2; break;
default: echo 'Not found';
}

$case1=20; $case2=50;
$test = array(0,0,0,30,0,40,0,50,0,60,0,70,0,80,0,90,0,100);
echo (array_search($case1, $test) + array_search($case2, $test));