CODEWITHSUNDEEP
php
hamp
hamp

Reputation: 85

How can I get a value from inside of function?

Is it possible to get values from inside a function and use those outside of the function?

Here is my code:

<?php
function cart() {
  foreach($_SESSION as $name => $value){
    if ($value>0) {
      if (substr($name, 0, 5)=='cart_') {
        $id = substr($name, 5, (strlen($name)-5));
        $get = mysql_query('SELECT id, name, price FROM products WHERE id='.mysql_real_escape_string((int)$id));

        while ($get_row = mysql_fetch_assoc($get)) {
          $sub = $get_row['price']*$value;
          echo $get_row['name'].' x '.$value.' @ &pound;'.number_format($get_row['price'], 2).' = &pound;'.number_format($sub, 2).'<a href="cart.php?remove='.$id.'">[-]</a> <a href="cart.php?add='.$id.'">[+]</a> <a href="cart.php?delete='.$id.'">[Delete]</a><br />';
        }
      }      
      $total += $sub ;
    }
  }
}
?>

Now my question is how can I get the value of $total? I want to use that value outside of the function. I have 2 functions 1 cart and 1 discount.

I tried return $total; (inside of function)

For example

$final = cart () - discount ();
echo $final;

It echos out both function, but code which is inside of function doesn't do any mathematical operation.

Upvotes: 3

Views: 5900

Answers (4)

publikz.com
publikz.com

Reputation: 961

  1. Your can use global scope. I.e. 

    $s = 1;
function eee()
{
 global $s;
 $s++;
}
echo $s;

  2. Your can got var/return var... if your need return more that 1 value - use array

    function eee( $s)
{
  return $s++;
}
eee($s=1);
echo $s;

Prefer 2'd. Cause global scope operationing - may cause problems, when app become's large.

Upvotes: 0

Rafe Kettler
Rafe Kettler

Reputation: 76955

If you put return $total at the very end of the function (right before the last curly brace), you should be able to use the result.

Upvotes: 0

Pushpendra
Pushpendra

Reputation: 4382

Write return $total; inside the function

Upvotes: 0

lonesomeday
lonesomeday

Reputation: 237905

You need to "return" the value. See the entry in the PHP manual for this. Basically, return means "exit this function now". Optionally, you can also provide some data that the function can return.

Just use the return statement:

<?php
  function cart()
  {
      foreach ($_SESSION as $name => $value) {
          if ($value > 0) {
              if (substr($name, 0, 5) == 'cart_') {
                  $id = substr($name, 5, (strlen($name) - 5));
                  $get = mysql_query('SELECT id, name, price FROM products WHERE id=' . mysql_real_escape_string((int)$id));
                  while ($get_row = mysql_fetch_assoc($get)) {
                      $sub = $get_row['price'] * $value;
                      echo $get_row['name'] . ' x ' . $value . ' @ &pound;' . number_format($get_row['price'], 2) . ' = &pound;' . number_format($sub, 2) . '<a href="cart.php?remove=' . $id . '">[-]</a> <a href="cart.php?add=' . $id . '">[+]</a> <a href="cart.php?delete=' . $id . '">[Delete]</a><br />';
                  }
              }
              $total += $sub;
          }
      }

      return $total;
  }
?>

Upvotes: 3

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