Numeric Index of an array

How can I get the numeric Index of an array when the index is a string? i.e $myArray = array ("first" => "my first value", "second" => "my second value", "third" => "my third value"); Lets say I want the Index of the "my second one": this would be "second" or numerid 1 (because the numeric index starts at zero). How can I get the numeric index when I only have the string-index (so array_keys is a nono) without making a loop like: $i = 0; foreach ($myArray as $index => $value) { if ($index == 'second') { echo $i; } $i++; } Is there another way to get the numeric index? thanx, Natascha