Record a strange problem

$arrD = array('0'=>'a','1'=>'b','2'=>'c');
                             echo key($arrD);               foreach($arrD as $intK => $val)
arrD));

$arrD = array('0'=>'a','1'=>'b','2'=>'c');
echo key($arrD);
foreach($arrD as $intK => $val)

{

The above introduces the recording of a strange problem, including aspects of it. I hope it will be helpful to friends who are interested in PHP tutorials.