I am trying to use functions to calculate the cost
i am not sure how to get my variable from my checkbox
and i need to calculate if the user is doing the one day conference he pays for one day meal plan if he does the two day conf he gets the two day meal plan and so on..
I was going to do it like if yes is checked
HTML Code:
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html lang="EN" dir="ltr" xmlns="http://www.w3.org/1999/xhtml">

<style>

body
{
color:black;
font-size:20px;

}
h1
{
color:orange;
text-align:center;
font-size:30px;

}
p
{

font-family:"Times New Roman";
font-size:20px;

}
</style>

<title>MAJOR PROJECT 1 PHP </title>

</head>
<body>

<h1>Nerd Roundup </h1>


<form method = "POST"
      action = "http://localhost/Assignments php class/calculationprogress.php">
  <fieldset>
    <label>
      Please type your  first name:
    </label>
    <input type = "text"
           name = "fName"
           value = "" /> <br />
            <label>
      Please type your  Last name:
    </label>
    <input type = "text"
           name = "lName"
           value = "" /> <br />
           
    
    Please type your  city:
    <input type = "text"
           name = "city"
           value = "" /> <br />
             Please type your  State:
    <input type = "text"
           name = "state"
           value = "" /> <br />
    Please type your  Zipcode:
    <input type = "text"
           name = "zipCode"
           value = "" /> <br />
   
<label for="other">Anything else you want to add?</label>
 <textarea id="other" name="other"></textarea><br />
	




<fieldset>
  <legend>HOW MANY DAYS</legend>
  <input type = "checkbox"
         name = "chkOne"
         value = "100.OO" /><label>ONE DAY $100.00</label>
  <input type = "checkbox"
         name = "chkTwo"
         value = "175.00" /><label>TWO DAYS $175.00</label>
  <input type = "checkbox"
         name = "chkThree"
         value = "325.00" /><label>THREE DAYS $325.00</label>
  
<br />

	<fieldset>
  <legend>DO YOU WANT THE MEAL PLAN?</legend>
  <input type = "checkbox"
         name = "mealPlan"
         value = "yes" /><label>YES</label>
        
  <input type = "checkbox"
         name = "mealPlan"
         value = "no" /><label>NO</label>
<br />
<br />

<h1>NERD TRACK</h1>
  <select name = "track">
    <option value = "PROGRAMMING TRACK">PROGRAMMING TRACK</option>
    <option value = "NETWORKING TRACK">NETWORKING TRACK</option>
    <option value = "SECURITY TRACK">SECURITY TRACK</option>
    <option value = "WEB TRACK">WEB TRACK</option>
  </select>
 
  <button type = "submit">
    place order
  </button>
</fieldset>
</form>
</body>
</html>
PHP Code:
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html lang="EN" dir="ltr" xmlns="http://www.w3.org/1999/xhtml">
<head>
<style>
body
{

background-color:#FF00FF;
}
h1
{
color:orange;
text-align:center;
}
p
{
font-family:"Times New Roman";
font-size:20px;
}
h1 {text-align:center;
}
</style>
<title>Assignment3</title>
</head>
<body>

<h1>Personal Information </h1>

<?php 
// define the variables
$confId rand(1,1000);
$fName $_POST["fName"];
$lName $_POST ["lName"];
$city $_POST ["city"];
$state $_POST ["state"];
$zipCode $_POST["zipCode"];
$other $_POST ["other"];
$chkOne $_POST["chkOne"];
$chkTwo $_POST["chkTwo"];
$chkThree $_POST["chkThree"];
$mealPlan $_POST[""];
$confTotal 0;
$no_errors TRUE;
$total 0;

checkInput();
calcPrice();
printConf();

 
//checkInput
function checkInput() {

if (
filter_has_var(INPUT_POST"chkOne")){
  print 
"<p>ONE DAY CONFERENCE</p> \n";
  
$total += filter_input(INPUT_POST"chkOne");
  
}

if (
filter_has_var(INPUT_POST"chkTwo")){
  print 
"<p>TWO DAY CONFERENCE</p> \n";
  
$total += filter_input(INPUT_POST"chkTwo");
  
}

if (
filter_has_var(INPUT_POST"chkThree")){
  print 
"<p>THREE DAY CONFERENCE</p> \n";
  
$total += filter_input(INPUT_POST"chkThree");
  
}
//end $total 


if (filter_has_var(INPUT_POST"mealPlan")){
 
}

if (
filter_has_var(INPUT_POST"noFood")){

}
// do they want the meal plan

$track filter_input(INPUT_POST"track");
// what conference track are they on 


if(empty($fName))
{
 
$no_errors FALSE;

echo 
'***FIRST NAME FIELD REQUIRED***** <br />' ;
 
    
    }
    
//get users first name
   


if(empty($lName))
{
$no_errors FALSE;

 echo 
'****LAST NAME FIELD REQUIRED***** <br /> ';
 
    
    }
    
// get users last name
    
if(empty($city))
{
$no_errors FALSE;

 echo 
'****CITY FIELD REQUIRED***** <br /> ';
  
    }
    
//get user city
    
if(empty($state))
{
$no_errors FALSE;

 echo 
'***STATE NAME FIELD REQUIRED***** <br /> ';
    }
//get user state


if(empty($zipCode))
{
$no_errors FALSE;
 
 echo 
'****ZIPCODE FIELD REQUIRED***** <br /> ';
 
    }
//get user zip code



if(empty($other))
{
$no_errors FALSE;
 
 
 
 echo 
'****TEXT FIELD REQUIRED***** <br /> ';
 
}
//get user additional comments

    
if ($no_errors == FALSE) {

echo 
"<br> <a href='major1progress.html'>Go back to form</a>";

    }
//end function checkInput
    
//beging function calculateCost
function calcPrice(){

global 
$total
    
$confTotal =filter_input(INPUT_POST,"confTotal");
    
$total filter_input (INPUT_POST"total");
    
$mealPlan filter_input (INPUT_POST"mealPlan");
    
    IF (! 
filter_has_var (INPUT_POST"mealPlan" )){
    
$total =="100" $confTotal $total+= 50;
    }
    else if (
$total=="175"){ $confTotal $total +=75;
    }
    else if (
$total =="225"){$confTotal $total +=100;
$no_errors == TRUE;
    }}
//end function cacluclateCost






//begin function printConf
function printConf(){
global 
$no_errors;
$no_errors FALSE;

if (
$no_errors == TRUE) {
print  
" <p> $fName $lName, <br />you have registered for Nerd Roundup 2013<br />
your planned track is 
$track<br />
<br /> You choose -confDay<br /> with -mPlan<br />
The total cost is: \$
$total <br />
    I hear the climate around 
$zipCode is great this time of year.
    <br />  Please make sure to bring cash, or your credit card to pay for the conference on the first day<br />  
     Your additional comments are as follows: 
      
$other <br /> </p>
      <p>Your Nerd Roundup confirmation number is  
$confId .</p> <br /> \n";

 }
     }
 
//end function printConf



   



?>

</body>
</html>