having issues adding values

[numerical25]

Im having issues adding values. Can php add numbers that are in a string like this

$this = "9.99";

Or does it have to be literally a number like this

$this = 9.99

The code below is a cart_manager class that totals the price.
the constuct parameter is an object of the product class that holds the product name and price and so on. When I add the values to the product class I add it like this

$insert->set_product('candy','tasty','10.99');

the first parameter puts the string into a varible called name.
second param is the description varible
third is the price

When i call the get_total() function. it returns 0 as if I put nothing in there. Whats going on ?

Here is my code. Im creating a cart that adds each products price like so...

class cart_manager { / CART MANAGER /
private $sql_con;
private $cart = array();
private $total;

	function __construct($products)
		{
		$this->total = 0;
			foreach($products as $value)
			{
				$this->total += $value->price;
			}
		}

	function get_total() {
		return $this->total;
	}

	function cart_insert($products){
		$this->total = 0;
		foreach($products as $value){
			$this->total += $products->price;
		}
	}

	function display_cart(){

		foreach ($this->cart as $product){
			echo $product."<br/>";
		}
	}

}

[tapos]

php is a loosely typed language. So when u add two numeric string by the add operator, the datatype is simply converted into integer/float etc. So you can add any numeric string as normal adding.
BTW you didn't sent the full code, so i can't check that. But whatever you send i found following problem with the cart insert function. cast insert function should be like this
function cart_insert($products){
$this->total = 0;
foreach($products as $value){
$this->total += $value->price;
}
}

BTW, i think this is not only the problem of your code.

[numerical25]

here is all the code

<?php

class product / PRODUCT CLASS /
{
private $product_name;
private $description;
private $price;

public function __construct($name, $desc, $price)
{
$this->product_name = $name;
$this->description = $desc;
$this->price = $price;
}

public function get_product_name()
{
return $this->product_name;
}

public function get_price()

{
return $this->price;
}
}/ PRODUCT CLASS END/

class product_config extends product / PRODUCT CONFIG CLASS /
{
private $storage = array();

// overwrite the parent's constructor
public function __construct()
{

}

function set_product($name, $desc, $price)
{
$this->storage[] = new product($name, $desc, $price);
}

function test()
{
echo $this->storage[0]->get_product_name();
}

function render_products()
{
if(!$this->storage)
{
return 'There are no products in storage!';
}
else
{
foreach($this->storage as $value)
{
echo $value->get_product_name()." ".$value->get_price()."</br>";
}

	 echo $total = $value->get_product_name() + $value->get_price();
  }

}
}/ PRODUCT CONFIG CLASS END /

class cart_manager { / CART MANAGER /
private $sql_con;
private $cart = array();
private $total;

	function __construct($products)
		{
		$this->total = 0;
			foreach($products as $value)
			{
				$this->total += $value->price;
			}
		}

	function get_total() {
		return $this->total;
	}

	function cart_insert($products){
		$this->total = 0;
		foreach($products as $value){
			$this->total += $value->price;
		}
	}

	function display_cart(){

		foreach ($this->cart as $product){
			echo $product."<br/>";
		}
	}

}

?>

here are a few values to display
<?php
$insert->set_product('candy','tasty',10.99);
$insert->set_product('ice cream,'tasty!!',10.99);

echo $insert->render_products();
$cart = new cart_manager($insert);
?>
<?php echo $cart->get_total(); ?>

I still get the outcome of 0.

[HalfaBee]

You should probably check that your class is actually doing what you expect.
Try using var_dump() to display/debug your data.

[Horizon88]

Also, please use the board's PHP tags around your code, it makes it much easier for us to debug and read in general. There's a link in my sig on how to use them all.

[numerical25]

Well numerical, if you take a close look at your code, you will find that you are calling a array that is consider private. in order for you to reach that array is to create a public function to retrieve that private array. That should help you to calculate your problem !

[numerical25]

Gee, thanks numerical, for your help

[numerical25]

Gee, thanks numerical, for your help