php在switch里能用表达式吗

<?php
if ($i == 0) {
    echo "i equals 0";
} elseif ($i == 1) {
    echo "i equals 1";
} elseif ($i == 2) {
    echo "i equals 2";
}

switch ($i) {
    case 0:
        echo "i equals 0";
        break;
    case 1:
        echo "i equals 1";
        break;
    case 2:
        echo "i equals 2";
        break;
}
?>

$var = 95;
switch(true){
      case $var < 100;
          $level = 1;
          break;
      case $var < 95;
          $level = 2;
          break;
      default :
      $level=9; break;
}