PHP idea help

mds1256 · September 29, 2009

Im in the middle of setting up a car configurator website and just wondering how i can accomplish(sp) this.

My idea is that there will be a running costing total at the bottom of the page, then above that there will be option that you can add and remove e.g. add metallic paint + £250.

What would be the easiest way to code this. My idea was to add each option as a variable and just use the GET to retrieve this from the url so it would be

page.php?paint=yes&cost=250

but cost would be a running total but just retrieved from the URL.

But i have realised that there are around 60 different options so it would be a nightmare to code this

any ideas to make it easier

Alex · September 29, 2009

What would the options be check boxes? If that's possible for what you're wanting to do that's what I'd do because you could do it like this:

<input type="checkbox" name="option[]" value="paint,250" />
<input type="checkbox" name="option[]" value="something,200" />

session_start();
foreach($_POST['option'] as $option)
{
     $values = explode(',' $option);
     $_SESSION['prices'][] = $values[1];
     $_SESSION['items'][] = $values[0];
}
echo array_sum($_SESSION['prices']); // Total

mds1256 · September 29, 2009

What would the options be check boxes? If that's possible for what you're wanting to do that's what I'd do because you could do it like this:

<input type="checkbox" name="option[]" value="paint,250" />
<input type="checkbox" name="option[]" value="something,200" />

session_start();
foreach($_POST['option'] as $option)
{
     $values = explode(',' $option);
     $_SESSION['prices'][] = $values[1];
     $_SESSION['items'][] = $values[0];
}
echo array_sum($_SESSION['prices']); // Total

yeah i think that is what i want but when coping your code i get

Parse error: parse error, unexpected T_VARIABLE in c:\inetpub\wwwroot\array.php on line 12

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1" />
<title>Untitled Document</title>
</head>

<body><?php
session_start();
foreach($_POST['option'] as $option)
{
     $values = explode(',' $option);
     $_SESSION['prices'][] = $values[1];
     $_SESSION['items'][] = $values[0];
}
echo array_sum($_SESSION['prices'][]); // Total
?>
<input type="checkbox" name="option[]" value="paint,250" />
<input type="checkbox" name="option[]" value="something,200" />

</body>
</html>

Alex · September 29, 2009

I edited my code for a small error (If you look at your quote you even quoted the fixed code).

mds1256 · September 29, 2009

I edited my code for a small error (If you look at your quote you even quoted the fixed code).

not too sure what you mean as i have re-copied your code and still getting it. Am i missing something ::)

Alex · September 29, 2009

Sorry.

session_start();
foreach($_POST['option'] as $option)
{
     $values = explode(',', $option);
     $_SESSION['prices'][] = $values[1];
     $_SESSION['items'][] = $values[0];
}
echo array_sum($_SESSION['prices']); // Total

Btw, you can't have any output before session_start() or you'll get a headers already sent error.

mds1256 · September 29, 2009

<?php
session_start();
foreach($_POST['option'] as $option)
{
     $values = explode(',', $option);
     $_SESSION['prices'][] = $values[1];
     $_SESSION['items'][] = $values[0];
}
echo array_sum($_SESSION['prices']); // Total
?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1" />
<title>Untitled Document</title>
</head>

<body>
<input type="checkbox" name="option[]" value="paint,250" />
<input type="checkbox" name="option[]" value="something,200" />


</body>
</html>

now i get

Warning: Invalid argument supplied for foreach() in c:\inetpub\wwwroot\array.php on line 3

Warning: array_sum() [function.array-sum]: The argument should be an array in c:\inetpub\wwwroot\array.php on line 9

mds1256 · September 29, 2009

sorry i forgot some additional coding lol.

i see how this works but when submitting it unchecks the boxes so i have no way to remove that option

<?php
session_start();
foreach($_POST['option'] as $option)
{
     $values = explode(',', $option);
     $_SESSION['prices'][] = $values[1];
     $_SESSION['items'][] = $values[0];
}
echo array_sum($_SESSION['prices']); // Total
?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1" />
<title>Untitled Document</title>
</head>

<body>
<form action="array.php" onsubmit="array.php" method="post">
  <p>
  <input type="checkbox" name="option[]" value="paint,250" />
  <input type="checkbox" name="option[]" value="something,200" />
</p>
  <p>
    <label for="Submit"></label>
    <input type="submit" name="Submit" value="Submit" id="Submit" />
</p>
</form>

</body>
</html>

PFMaBiSmAd · September 29, 2009

To allow you to uncheck an option, you need two things -

1) You need to display and propagate the current 'checked' value for each checkbox in the form, and

2) On each form submission, you need to loop through a list of the available checkboxes and for any that are not set, unset whatever data you are storing that indicates they are checked. Making a list someplace (database, array...) of the list of available checkboxes will also allow you to dynamically generate the checkboxes on the form so that you don't need to actually type a bunch of lines of HTML that you must edit every time you add, change, or remove a choice.

Alex · September 29, 2009

My example was just to give you an idea, not to actually use.

If you want a more detailed explanation / example just ask.

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