Re: Problem referencing variables in objects

I apologize George, I was not complete in my text.
I do use $this->_element and $this->_message in every case I reference the
variables.

Rob

"George Mills" <gmills@xxxxxxxxxxxxxxxxxxx> schreef in bericht
news:uVpcg.17249$Lg.7140@xxxxxxxxxxxxxxxxxxxxxxxxxxx
Rob Dorn wrote:
Hello all.

I have an urgent problem building a small form processing system.and hope
somebody out
there can help me?

I have a form class which contains severals elements of the type input
text (created by the
TextInput class). These element classes are added to the $_elements array
that acts as an
object stack (see pseudo code below).

The render() function of the form will loop through the $_elements stack
and calls the render()
functions of each element. This element render() function will return the
html and will finally
build the complete page.

This method workt fine, so I would like to do the same with the validate
function. This also work
as expected, except for one thing:

When the validation of a text input element failes I fill a class
variable called $_message. This
messages should be rendered (displayed) in the "div" element containing
the input text element.
However this is not the case. The message is set and known in the
validate() function but not in
the render() function which is called some time later.

So what am I doing wrong? Is this a problem of the variable scope, or the
wrong way to reference
objects or variables? Can somebody please give me hint?


class Form
{
var $_elements = array();

function render()
{
// render every element in the form $_elements array (return the html
sting)
}

function validate()
{
// call the validate() function of every element in the form
$_elements array
}

}

class TextInput
{
var $_message;

function render()
{
// render this element (return the html sting)
// if a $_message is set (by the validate function) render it into
the html output
}

function validate()
{
// see if the value of this element is valid; if not set the
$_message variable
}
}

You asked for a hint not the solution so I hope I don't give too much
away. :)

In validate and render are you referring to $this->_message or $_message?
$this->_message is the class's variable, $_message is the function's
variable.


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