sessions, counter problem !

[farahZ]

hey,i dont know if my work is correct or no !

I am trying to create several session arrays, and fill them with user inputs

the common between the session arrays will be the counter ($c)

then using the counter, with the help of a for loop, i want to print the arrays !!

here is the code.. please have a look, any mistake or notice please inform me

 

 

<?php
if (isset($_POST['add']))
{
 
  // check if an option has been selected
  if (empty($_POST['foodType']))
  {
    echo 'You need to select some food!'; 
  }
  else
  {
    if (!isset($_SESSION['foodTypes']) || !isset($_SESSION['Quantity']) || !isset($_SESSION['Calories']) || !isset($_SESSION['Unit']))
    {
 // if the session is not yet created, create it now
    $_SESSION['foodTypes'] = array();
$_SESSION['Quantity']= array ();
$_SESSION['Calories']=array();
$_SESSION['Unit']=array();
$c=0;
    }
    // check to see if the newly added food type is not already in the array
    if (in_array($_POST['foodType'], $_SESSION['foodTypes']) === false) 
    {
      // The selected food item is not in the array
      // add the selected food item to total food array
      $_SESSION['foodTypes'][$c] = $_POST['foodType'];
 $_SESSION['Quantity'][$c]= $_POST['fooDquantity'];
 $_SESSION['Unit'][$c]=$_POST['quantityValue'];
 echo $c;
 $c++;
//$foodQuan = $_POST['fooDquantity'];
// $foodVal=$_POST['quantityValue'];
//  $_SESSION['Quantity'][$c]= $foodQuan ." ". $foodVal;
    }
  }
 
} 
 

function print_array(){
if(!empty($_SESSION['foodTypes'])){
echo '<br>'. '<br>'. "Food Added:" . '<br>';
 // display the current food list
 
 for ($i =0; $i <=$c; $i++)
 {
 $fcal=getCalories($_SESSION['foodTypes'][i], $_SESSION['Quantity'][i], $_SESSION['Unit'][i]);
 echo $_SESSION['foodTypes'][i] . '  ' . $fcal . ' calories' .'<br>';
 $calories= $calories + $fcal;
 }
/* $_SESSION['Calories']=$fcal;
 foreach ($_SESSION['foodTypes'] as $food)
{
$fcal=getCalories($food, $foodQuan, $foodVal);
echo $food . '  ' . $fcal . ' calories' .'<br>';
$calories= $calories + $fcal;
//$calories= calculate($_SESSION['foodTypes']);
}
*/
echo 'The amount of Calories is now: ' . $calories, "\n";
createDropdown($_SESSION['foodTypes']);
}
?>
}

[Jessica]

  On 5/29/2013 at 7:12 PM, farahZ said:

 

hey,i dont know if my work is correct or no !

 

 

Does it work? Are you really asking us to help with code and you don't even know if there's a problem?

[farahZ]

Hey

Its not working and I have no clue why

Problem with the counter cz I tried echoing it.. no value nothing

[requinix]

You aren't saving the value of $c and your for loop at the bottom is missing some $s. At least.

[farahZ]

Saving the value of $c??

What do u mean? Any quick example

[requinix]

You do stuff with $c but it never comes from the session or gets saved into the session. It starts at 0 every time.

 

You don't even need it though if you moved your data around to something a little better. Try a structure like

$_SESSION[food] = array(
	array(
		[type] =>
		[quantity] =>
		[calories] =>
		[unit] =>
	),
	array(
		[type] =>
		[quantity] =>
		[calories] =>
		[unit] =>
	),
	array(
		[type] =>
		[quantity] =>
		[calories] =>
		[unit] =>
	),
	...
)

If the food type is a string you can use it as array keys too so it's easier to tell if one has been... "used", or whatever... yet.

[farahZ]

i think i got your idea

but how will be able to call them afterwards for printing? because each foodtype has its own type, quantity and unit..

 

thats the neat code.. i really dont know if i'm able to make myself clear

if (isset($_POST['add']))
{
 
  // check if an option has been selected
  if (empty($_POST['foodType']))
  {
    echo 'You need to select some food!'; 
  }
  else
  {
    if (!isset($_SESSION['foodTypes']) || !isset($_SESSION['Quantity']) || !isset($_SESSION['Unit']))
    {
 // if the session is not yet created, create it now
    $_SESSION['foodTypes'] = array();
$_SESSION['Quantity']= array ();
$_SESSION['Unit']=array();
$c=0;
    }
    // check to see if the newly added food type is not already in the array
    if (in_array($_POST['foodType'], $_SESSION['foodTypes']) === false) 
    {
      // The selected food item is not in the array
      // add the selected food item to total food array
      $_SESSION['foodTypes'][$c] = $_POST['foodType'];
 $_SESSION['Quantity'][$c]= $_POST['fooDquantity'];
 $_SESSION['Unit'][$c]=$_POST['quantityValue'];
 $c++;
    }
  }
 
} 
 
if (isset($_POST['submit']))
{
// check if the session exists, or if its empty
if (!isset($_SESSION['foodTypes']) || empty($_SESSION['foodTypes']))
{
echo 'No food in the list to submit!';
}
 
else
{
$con=mysqli_connect("localhost","root","","inshapewebsite");
if (mysqli_connect_errno($con))
{
    echo "Failed to connect to MySQL: " . mysqli_connect_error();
}  
 
$date=date("Y-m-d");
for ($i =0; $i <=$c; $i++)
{
$cal=getCalories($_SESSION['foodTypes'][i], $_SESSION['Quantity'][i], $_SESSION['Unit'][i]);
$sql="";
$clid=$_SESSION['views'][0];
$q= $_SESSION['Quantity'][i]. ' ' . $_SESSION['Unit'][i];
$food=$_SESSION['foodTypes'][i];
 
$sql = "INSERT INTO fooddiary (ID, Date, DayTime, Food, Quantity, Calories)
VALUES ('$clid', '$date', 'Lunch', '$food', '$q', $cal)";
var_dump($sql);
$result = mysqli_query($con, $sql) or die(mysqli_error());
}
 
$total= calculate($_SESSION['foodTypes'], $_SESSION['Quantity'], $_SESSION['Unit']);
echo 'The total calories submitted is ' . $total, "\n"; 
unset($_SESSION['foodTypes']);
mysqli_close($con);
}
 
function calculate($foodTypes, $Quantity, $Unit){
$calories = 0;
for ($i =0; $i <=$c; $i++)
 {
 $fcal=getCalories($_SESSION['foodTypes'][i], $_SESSION['Quantity'][i], $_SESSION['Unit'][i]);
 $calories= $calories + $fcal;
 }
return $calories;
}
 
function getCalories($food, $foodQuan, $foodVal)
{
// Create connection
$con=mysqli_connect("localhost","root","","inshapewebsite");
// Check connection
if (mysqli_connect_errno($con))
{
echo "Failed to connect to MySQL: " . mysqli_connect_error();
} 
$query = "SELECT Size, Calories FROM food where Food='$food' ";
$result = mysqli_query($con,$query);
$row = mysqli_fetch_array($result);
 
if($foodVal=='Portion')
{
$fcal=$foodQuan*$row['Calories'];
}
else if($foodVal=='Grams')
{
$fcal=($foodQuan*$row['Calories'])/$row['Size'];
}
else $fcal=$row['Calories'];
return $fcal;
}

[farahZ]

as u have said before, the problem is with $c .. its not being changed or saved!

[mac_gyver]

by using three arrays, you are making three times too much code.

 

do this -

 

  On 5/29/2013 at 8:54 PM, requinix said:

If the food type is a string you can use it as array keys too so it's easier to tell if one has been... "used", or whatever... yet.

 

 

and all your code will be simple -

if (isset($_POST['add'])){
    if (empty($_POST['foodType'])){
        echo 'You need to select some food!';
    } else {
        if(!isset($_SESSION['food'][$_POST['foodType']])){
            $_SESSION['food'][$_POST['foodType']] = array('Quantity' => $_POST['fooDquantity'], 'Unit' => $_POST['quantityValue']);
        }
    }
}

[farahZ]

and how can i print them and submit it?

i.e. how can i extract their values???

 

using a for loop or foreach??

[mac_gyver]

you would just use a foreach(){} loop.

 

 

for your database query to get the calorie information, you should not run a query inside of a loop. since the foodTypes are the keys of the $_SESSION['food'] array, just get all the keys and run one query to get all the rows you need -

$types = implode("','",array_keys($_SESSION['food']));
$query = "SELECT Food, Size, Calories FROM food where Food IN('$types')";
$result = mysqli_query($con,$query);
$calories = array();
while($row = mysqli_fetch_assoc($result)){
    $calories[$row['Food']] = $row; // store the rows using the Food as the key so that this information can be easily accessed when needed
}

as you loop over the $_SESSION['food'] array, the key (foodType) from this array can be used to get the corresponding calories/size information from the $calories array that was formed in the above code.