An easier way to deal with an array of values?

[redneck]

I am working on a small application which accepts a series of values, and then does a little calculation and displays a result. The form for entering the values looks like this:

      <form action="$SERVER[PHP_SELF]" method ="post">

  <table><tr><td align="right">
  X-ring: </td><td>  <input type="text" size="4" name="xring"> </td></tr><tr><td align="right">
  10-ring: </td><td> <input type="text" size="4" name="10ring"> </td></tr><tr><td align="right">
  9-ring: </td><td>  <input type="text" size="4" name="9ring"> </td></tr><tr><td align="right">
  8-ring: </td><td>  <input type="text" size="4" name="8ring"> </td></tr><tr><td align="right">
  7-ring: </td><td>  <input type="text" size="4" name="7ring"> </td></tr><tr><td align="right">
  6-ring: </td><td>  <input type="text" size="4" name="6ring"> </td></tr><tr><td align="right">
  5-ring: </td><td>  <input type="text" size="4" name="5ring"> </td></tr><tr><td align="right">
  4-ring: </td><td>  <input type="text" size="4" name="4ring"> </td></tr><tr><td align="right">
  3-ring: </td><td>  <input type="text" size="4" name="3ring"> </td></tr><tr><td align="right">
  2-ring: </td><td>  <input type="text" size="4" name="2ring"> </td></tr><tr><td align="right">
  1-ring: </td><td>  <input type="text" size="4" name="1ring"> </td></tr>
  </table>

  <input type="hidden" name="stage" value="process">
  <input type="submit" value="Submit">

  </form>

Now the problem I have is each of the elements of the array $_POST will have to be treated slightly differently. The lame solution I am using now (which works just fine) looks like this:

  function process_form() {

$score = 0;
$shots = 0;

echo 'Hello ' . $_POST['stage'] . '!<p>';

$shots = $shots +  $_POST['xring'];
$current_score  =  $_POST['xring'] * 10;
echo 'X-ring = ' . $_POST['xring'] . ' &times; 10 = ' . $current_score . '<br>';
$score = $score + $current_score;    

$shots = $shots +  $_POST['10ring'];
$current_score  =  $_POST['10ring'] * 10;

echo '10-ring = ' . $_POST['10ring'] . ' &times; 10 = ' . $current_score . '<br>';
$score = $score + $current_score;    

$shots = $shots +  $_POST['9ring'];
$current_score  =  $_POST['9ring'] * 9;
echo '9-ring = ' . $_POST['9ring'] . ' &times; 9 = ' . $current_score . '<br>';
$score = $score + $current_score;    

$shots = $shots +  $_POST['8ring'];
$current_score  =  $_POST['8ring'] * 8;
echo '8-ring = ' . $_POST['8ring'] . ' &times; 8 = ' . $current_score . '<br>';
$score = $score + $current_score;    

$shots = $shots +  $_POST['7ring'];
$current_score  =  $_POST['7ring'] * 7;
echo '7-ring = ' . $_POST['7ring'] . ' &times; 7 = ' . $current_score . '<br>';
$score = $score + $current_score;    

$shots = $shots +  $_POST['6ring'];
$current_score  =  $_POST['6ring'] * 6;
echo '6-ring = ' . $_POST['6ring'] . ' &times; 6 = ' . $current_score . '<br>';
$score = $score + $current_score;    

$shots = $shots +  $_POST['5ring'];
$current_score  =  $_POST['5ring'] * 5;
echo '5-ring = ' . $_POST['5ring'] . ' &times; 5 = ' . $current_score . '<br>';
$score = $score + $current_score;    

// et cetera...  you get the idea

  }  // end of function process_form()

I suppose I could toss that echo/add stuff into a little function somewhere, but I still need to do a slightly different calculation on each element. I am reluctant to just base the multiplier on the element's position in the array, in case the form changes slightly. I don't think a switch statement really simplifies anything.

Is there a cleaner way to do this?

[LordShryku]

Try this:

function process_form() {

$score = 0;
$shots = 0;

echo 'Hello '.$_POST['stage'].'!<p>';

$shots         += $_POST['xring'];
$current_score  = $_POST['xring'] * 10;
$score         += $current_score;    
echo 'X-ring = '.$_POST['xring'].' × 10 = '.$current_score.'<br>';

for($i=10;$i>0;$i--) {
   $shots         += $_POST[$i.'ring'];
   $current_score  = $_POST[$i.'ring'] * $i;
   $score         += $current_score;    
   echo $i.'-ring = '.$_POST[$i.'ring'].' × '.$i.' = '.$current_score.'<br>';
}
}

[tekky]

oh oh and to save more space! 😃

Try this:

function process_form() {

$score = 0;
$shots = 0;
$xring = $_POST['xring']
echo 'Hello '.$_POST['stage'].'!<p>';

$shots         += $xring;
$current_score  = $xring * 10;
$score         += $current_score;    
echo 'X-ring = '.$xring.' × 10 = '.$current_score.'<br>';

for($i=10;$i>0;$i--) {
   $iring = $_POST[$i.'ring']
   $shots         += $iring;
   $current_score  = $iring * $i;
   $score         += $current_score;    
   echo $i.'-ring = '.$iring.' × '.$i.' = '.$current_score.'<br>';
}
}

not a huge save, but its smaller 😉

[redneck]

Thanks, this is great.

I pick up PHP every few months and it's so hard to remember many of the constructs I might have used in the past.