Need help with subtraction and image load.

[mullz]

Hi all,

I'am having problems with something I have been asked to do.

I have got 3 days to do this and I cant find a gpl script out there to help me do this quickly!

Bascily I have 20 questions.
Each question has 3 columns.
The first Column has a scale of 6-10 which the user inputs.
The second Column has a scale of 1-5 which the user inputs.

I need some code which calculates (column1) - (column2) = (column 3).

Column 3 needs to call an image either a red, amber or green dot.

Red dot if the answer is between 7-10
Amber dot if the answer is between 3-7
Green dot if the answer is between 1-3

So if I answer 10 for column 1 and 4 for column 2, column 3 would be 6 which would return an amber dot.

I can find php calculators but I am hopeless at starting new code and only ever done reverse engineering stuff.

If anyone could help it would be much appreciated and wont go un noticed.

Many Thanks

A desperate and frustrated Mullz :o

[Ausx]

What are the vars containing the user data? providing they are in arrays of $answer_a and $answer_b then it could go like this, just change it as you need it.

function eachone($check, $first, $last) {
   $rst = 0;
   $all = range($first, $last);
   foreach ($all as $value) {
      if ($value == $check) {
         $rst = 1;
      }
   }
	if ($rst == 1) {
		return true;
	} else {
		return false;
	}
}

function subtract($value1, $value2) {
	$total = $value1 - $value2;
	if ($total < 0 || eachone($total, "0","3")) 
	    return "green.gif";
	} elseif (eachone($total, "4","7")) {
	    return "amber.gif";
	} elseif (eachone($total, "8","10")) {
	    return "red.gif";
	} else {
	   echo 'Answer not in 1 - 10 range';
	}
}

$num = 0;
while (20 > $num) {
	$total = $answer_a[$num] - $answer_b[$num];
    echo '<img src="where_ever/'.subtract($answer_a[$num], $answer_b[$num]).'" />';
$num++;
}

I'd be suprised if that actully works but it should give you an idea.

[mullz]

I presume I can just use $answer_a etc..

I will try and adapt this into the form.. might get stuck though lol

Cheers for your help and I might be back :rolleyes:

[Ausx]

Well if it is from $_POST try this:

$add = 0;
while (20 > $add) {
  $answer_a[$add] = $_POST['choice_a_'.$add];
  $add++;
}
$add = 0;
while (20 > $add) {
  $answer_b[$add] = $_POST['choice_b_'.$add];
  $add++;
}

If I'm suprised the code in the first post will work without a bit of changing I'll be amazed if that did. From the form the names of the field should be for the first field for question 1 should be answer_a_0 the second answer_b_0, the first field for question 2 answer_a_1 etc.

[mullz]

Ok so I'm flumuxed as where and how to intergrate this with the form 😕

Its amazing how much you forget when you haven't touched it for a year 🙁

I have attached the page I want to use if someone could point me in the right direction..

thanks again for your time.

[mullz]

Could someone just show me where to put the code in the form and I will try and whack the rest in?

With cherries on top etc

[Ausx]

old post - ignore this :quiet:

[mullz]

Coolio mate,

I added the php bit to the form and I can see the 20 boxes appear but when I fill them in and it goes to whereever.php it is just a blank page?

Thanks for helping mate, you will be a great asset to the forum 🙂

[Ausx]

Oh yeah, sorry. Your red amber and green imgs would have to be: red.gif, amber.gif and green.gif and (if you're using that example be in a folder called 'where_ever/' in where the pages are).

Change where it links to in the bottom loop if they're somewhere else and change the file names in the subtract function to what ever you called your red, amber and green images.

[mullz]

Yeah I done that before, forgot to mention. they in the root so I just left the slash in but took the rest out.. is this correct?

echo '<img src="/'.subtract($answer_a[$num], $answer_b[$num]).'" />';

I have tried without the slash and have tried with a ./ but still shows nothing.

www.expression7.com/studyskills.php

Is there anyway of doing this in the same page like with a calculate button at the bottom or is this cause its a form?

Thanks again Ausx 😃

[Ausx]

Try the updated code 4 posts up it's a bit neater, it also prints somthing regardless of the image. It may be better to remove the where_ever.php and shove the images in the same folder the two pages are in to make sure it's not the code messing it up.

If you want it on one page do this

1) Remove the action="" from <form> and add name="fsubmit" to <submit>
2) Move the form down a few lines and write

 if ($fsubmit) {
// Copy the stuff from the second page here without the php tags
} else {
?>
// Cut and paste the form here
<?php
}

I wouldn't do that until you definatly have it working

[mullz]

Hummm swapped the code and took out the reference to the where_ever/ on the images but still a blank page :queasy:

I'm leaving work now but will check back tomorrow.

Thanks ever so much for your time 🙂

Mullz

[Ausx]

Okay, here's what I've got: http://testgroundsphp.awardspace.com/subtractscript/test.php

And the code used is this:

test.php

<html><body>

<form action="test2.php" method="post">
<?php
$num = 0;
while (20 > $num) {
echo ''.$num.' <input type="text" name="choice_a_'.$num.'" />  ||  <input type="text" name="choice_b_'.$num.'" /><br/>';
$num++;
}
?>
<input type="submit" value="Submit" />
</form>

</body></html>

test2.php

<?php

$add = 0;
while (20 > $add) {
  if (!is_numeric($_POST['choice_b_'.$add])) { die("You must enter numbers only!"); }
  $answer_a[$add] = $_POST['choice_a_'.$add];
  $add++;
}
$add = 0;
while (20 > $add) {
  if (!is_numeric($_POST['choice_b_'.$add])) { die("You must enter numbers only!"); }
  $answer_b[$add] = $_POST['choice_b_'.$add];
  $add++;
}

function eachone($check, $first, $last) {
   $rst = 0;
   $all = range($first, $last);
   foreach ($all as $value) {
      if ($value == $check) {
         $rst = 1;
      }
   }
    if ($rst == 1) {
        return true;
    } else {
        return false;
    }
}

function subtract($value1, $value2) {
    $total = $value1 - $value2;
    if ($total < 0 || eachone($total, "0","3")) {
        return 'green';
    } elseif (eachone($total, "4","7")) {
        return 'amber';
    } elseif (eachone($total, "8","10")) {
        return 'red';
    } else {
       echo 'Answer not in 1 - 10 range';
    }
}

$num = 0;
while (20 > $num) {
    echo 'Answer '.$num.': '.subtract($answer_a[$num], $answer_b[$num]).'<br />';
$num++;
}
?> 

If that doesn't work I'm at a loss.