- var_dump: documentation ( source)
<?php
class X {
var $_x = 0;
function set($x) { $this->_x = $x; }
function disp() { var_dump($this); }
}
$x = new X;
$a[0] = $x;
$x->set(2);
$a[0]->disp();
$x->disp();
$b = null;
var_dump(intval(isset($b)));