extract() to object variables

[bilibytes]

Hi everyone,

I am wondering if it is possible to extract the key values of an array into object variables.

lets say i have the following $_REQUEST array:

$var_array = array("color" => "blue",
                   "size"  => "medium",
                   "shape" => "sphere");
extract($var_array, EXTR_IF_EXISTS);
 

and the the following object:

Class Listener
{
    public $color;
        public $size;
 
    public function __construct(){
        if(isset($_REQUEST)){
 
            extract($_REQUEST,  EXTR_IF_EXISTS);
            return true;
        }
        else{
 
            return false;
 
        }
    }
 
}

how could i use extract, to store the Key=>values into the object variables:

echo $this->color //blue
echo $this->size //medium

thankyou

[Atli]

Hi.

You can simply loop through the array and add each array element as a property.

For example:

class foo
{
    public function __construct($inArray)
    {
        foreach($inArray as $_key => $_value)
        {
            $this->$_key = $_value;
        }
    }
}
$arr = array('color' => 'blue', 'size' => 'medium');
$inst = new foo($arr);
print_r($inst);
 

Which should give you:

foo Object
(
    [color] => blue
    [size] => medium
)
 

[bilibytes]

Thankyou,

the problem is that i cannot use the IF_EXISTS ability from the extract() function.

if i have a request[key] that is not expected, i would store it, which is a thing i would like to avoid...

thanks any way.

[Atli]

Then why don't you just pick out the elements you want and leave the rest?

Check out the array_intersect_key function.
It should do the trick.