Posted by purcaholic on 05/28/07 21:52

On 28 Mai, 23:36, vinnie <centro.ga...@gmail.com> wrote:
> This is my first "class" algorithm: when i execute it, i get this
> error:
>
> <<Fatal error: Call to undefined function: sum() in d:\class.php on
> line 20>>
>
> what's wrong? The class has the function, so why it says undefined?
>
> <?php
> print("first time class");
> class somma
> {
> var $uno=10;
> var $due=15;
> var $tre=15;
> function sum($uno, $due, $tre)
> {
> $totale = $uno + $due + $tre;
> return($totale);
> }
> function sum_2()
> {
> $totale = $this->sum($this->uno, $this->due, $this->tre);
> return $totale;
> }
> }
> $sum=sum(34,40);
> print("$sum");
> ?>

Hi vinnie,

you have declared sum function inside the somma class, and you're
trying to use it outside the class scope. This will not work.

First you should create an instance of somma and then call the sum
function using "->" operator.
Example:
[snip]
$mySomma = new somma();
$sum=$mySomma->sum(34,40);
print("$sum");
[/snap]

purcaholic

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