Help with my function, please

[alfordjj]

I'm getting a "Fatal error: Can't use function return value in write context in..." error and I'm not sure why. I'm certain I'm missing some little thing somewhere, but I can't see it. I'm hoping one of you people who always seem to be much brighter than myself can point out what I'm doing wrong.

Here is the function:

//function that clears the "$" sign and gets the cost for the item
function item_cost($cost, $amount)
{
	$cost2 = preg_replace("/[^a-zA-Z0-9s.]/", "", $cost);  //removes the "$" sign
	$cost1 = (float)$cost2;                                //makes sure the variable is a number
	$amount1 = (float)$amount;                             //makes sure the variable is a number
	$x= $cost1 * $amount1;                                 //multiplies the amount ordered by the number ordered
	return $x;
}

Here is the line that calls the function:

$item_price($i)= item_cost($price[$i], $amount_ordered);

The function is supposed to strip off any "$" and then multiply the two numbers together.

Thanks everyone!!

 

[alfordjj]

Durrrrr...... I found it. I put () instead of [] on the array.

God made me stupid to keep me humble, I guess!