Determine whether array key value is blank - php

Question

I have an array like below, as you can see the last array [adad] value is blank, how can I write an if statement to tell whether this is blank.
Array
(
[K] => Array
(
[0] => mabel__chan
[1] => mabel chan
)
[B] => Array
(
[0] => kieron br
)
[C] => Array
(
[0] => a br
[1] => a
)
[adad] => Array
(
[0] =>
)
)
I have tried doing this
if (count(array_filter($array)) == 0) {}
Pseudo code
if(array[key] == blank) {
echo "is blank";
} else {
echo "isn't blank";
}
**PHP Script this is how I get my data from mongoDB*
The answer below is working correctly when I use echos but now when I'm trying to push into new arrays its broken somewhere I get no data back anymore.
$col = "A" . $user->agencyID;
$db = $m->rules;
$collection = $db->$col;
$id = $_POST['ruleID'];
$search = array(
'_id' => new MongoId($id)
);
$cursor = $collection->find($search);
$validTagsArray = array();
$validArray = array();
foreach ($cursor as $key => $value) {
$temp = array_walk($array, function($v, $k) {
if (count(array_filter($v)) === 0) {
foreach ($value['AutoFix'] as $keyTwo => $valTwo) {
$x = 0;
$validTagsArray['data'][] = array($keyTwo, $x);
}
} else {
foreach ($value['AutoFix'] as $keyTwo => $valTwo) {
$x = 0;
foreach ($valTwo as $key => $value) {
$x++;
}
$validTagsArray['data'][] = array($keyTwo, $x);
}
}
});
}
echo json_encode($validTagsArray);

Answer 1

You can try this -
$array = array
(
'K' => array('0' => 'mabel__chan','1' => 'mabel chan'),
'B' => array('0' => 'kieron br'),
'C' => array('0' => 'a br', '1' => 'a'),
'adad' => array('0' => '')
);
$temp = array_walk($array, function($v, $k) {
if(count(array_filter($v)) === 0) { // check the count of non-empty elements in the sub array
echo $k . ' is empty';
}
});
Output
adad is empty

Answer 2

You can write as:
if([adad][0]== " ")
{
}
You can also try this :
foreach($array as $key=>$value){
if(empty($value))
echo "empty";
}