I need to know how many arrays have valid keys, how many arrays with valid keys in multidimensional array. Let me explain:
Input:
Array
(
[65] => Array
(
[1] => Array
(
[0] => Array
(
[mediumid] => 65
[mediumname] => VINYL
[trackid] => 525
[trackposition] => 1
[tracklocation] => SIDE A
[tracknumber] => 1
[trackname] => I love u
)
[1] => Array
(
[mediumid] => 65
[mediumname] => VINYL
[trackid] => 526
[trackposition] => 1
[tracklocation] => SIDE A
[tracknumber] => 2
[trackname] => Sun is yellow
)
)
[2] => Array
(
[0] => Array
(
[mediumid] => 65
[mediumname] => VINYL
[trackid] => 527
[trackposition] => 2
[tracklocation] => SIDE B
[tracknumber] => 1
[trackname] => Car red
)
[1] => Array
(
[mediumid] => 65
[mediumname] => VINYL
[trackid] => 528
[trackposition] => 2
[tracklocation] => SIDE B
[tracknumber] => 2
[trackname] => Lady in red
)
)
)
[769] => Array
(
[] => Array
(
[0] => Array
(
[mediumid] => 769
[mediumname] => DVD
[trackid] =>
[trackposition] =>
[tracklocation] =>
[tracknumber] =>
[trackname] =>
)
)
)
)
The mediums[65] next array contains 2 valid keys (1 and 2). The mediums[769] next array contains no valid keys
Therefore only mediums[65] contains valid keys, so total of arrays with valid keys = 1. I need to find that total. How ?
I've try using array_keys and array_filter, with no success (or either i'm doing it wrong)