- print_r: documentation ( source)
<?php
$values = array(
(object)array('thisAttribute' => null),
(object)array('thisAttribute' => 'value'),
(object)array('thisAttribute' => null)
);
print_r($values);
foreach($values as $value)
{
$myVal = $value->thisAttribute;
if(isset($myVal)) print("FOUND");
if(!isset($myVal)) print("NOT FOUND");
}