[Ulimited get variable from form to $_POST]

for ($i=1;$i<10;$i++)

{
         if (isset($_POST['btnsubmit']))

           {
              $fram=$_POST['fram_'.$i];
              $year=$_POST['year_'.$i];
              $ton=$_POST['ton_'.$i];
              $model=$_POST['model_'.$i];
              echo $fram."\t";
              echo $year."\t";
              echo $ton."\t";
              echo $model."\t";
              echo "<br>";

           }

}

 

This code above will show variable till 9 but i want to show only sometime 2 or sometime 3 or sometime 5 how can i close other variable

what code i can use or what function ?

 

[[SOLVED] $_POST variables and persistence]

for ($i=1;$i<10;$i++){
  if (isset($_POST['btnsubmit'])){
$fram=$_POST['fram_'.$i];
$year=$_POST['year_'.$i];
$ton=$_POST['ton_'.$i];
$model=$_POST['model_'.$i];
echo $fram."\t";
echo $year."\t";
echo $ton."\t";
echo $model."\t";
echo "<br>";

 

it echo all variable till $i<10

but if i want to echo just 5 variable  it will error start from 5 to 9 how can i solve it ??

need help please!!!!