<?php

class Test {

    public $handle = 'Handle';
    public $class = 'Class';
    public $this = 'This';
    public $function = 'Function';
    public $echo = 'Echo';
    public $return= 'Return';
    
    function __construct()
    {
        $this->{'<?php echo "Hello"; ?>'} = 'World';
    }

}

$c = new Test;
foreach ($c as $property => $value)
{
    echo $property.': '.$value."\n";
}

handle: Handle
class: Class
this: This
function: Function
echo: Echo
return: Return
<?php echo "Hello"; ?>: World