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How to get the sum of selected checkboxes?
plz help
[code=php]
<!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=utf-8″ />
<title>Untitled Document</title>
</head>
<body>
<?php
// Code downloaded from html-form-guide.com
// This code may be used and distributed freely without any charge.
//
// Disclaimer
// ———-
// This file is provided “as is” with no expressed or implied warranty.
// The author accepts no liability if it causes any damage whatsoever.
//
if(isset($_POST[‘formSubmit’]))
{
$aDoor = $_POST[‘formDoor’];
if(empty($aDoor))
{
echo(“<p>not selected</p>n”);
}
else
{
$N = count($aDoor);
echo(“<p>you select $N box <br>”);
for($i=0; $i < $N; $i++)
{
echo($aDoor[$i] . ” “);
}
echo(“</p>”);
}
//and so on
}
?>
<form action=”<?php echo htmlentities($_SERVER[‘PHP_SELF’]); ?>” method=”post”>
<p>
Which buildings do you want access to?<br/>
<input type=”checkbox” alt=”gio” name=”formDoor[]” value=”10″ />Acorn Building<br />
<input type=”checkbox” name=”formDoor[]” value=”20″ />Brown Hall<br />
<input type=”checkbox” name=”formDoor[]” value=”30″ />Carnegie Complex<br />
<input type=”checkbox” name=”formDoor[]” value=”40″ />Drake Commons<br />
<input type=”checkbox” name=”formDoor[]” value=”50″ />Elliot House
</p>
<input type=”submit” name=”formSubmit” value=”Submit” />
</form>
</body>
</html>