PHP里的在while循环和do...while()循环里写Continue

<?php

echo "<br/>------continue do...while()-------<br/>";

$b=1;
do{
  if($b==3){
     continue;
   }
   echo $b."<br/>";
   //$b++;
}while(++$b<=5);

?>


<?php

echo "<br/>------continue while-------<br/>";

$b=1;
while($b<=5){
if($b==3){
    $b++;
    continue;
}
echo $b."<br/>";
$b++;
}

?>