php - How to check if $array = array(1) { [""]=> NULL } is true or false -

i have addon case array gets on var_dump($array) :

array(1) { [""]=> null } 

how can check if true or false? if array set e.g.

array(1) { ["test"]=> string(2) "test" }  

i tried

if ($array == null) if ($array[""] == null) if ($array[""] == "null") if ($array == "null") 

"" array-index little bit scary ...

since $array[0] first element won't work, try figure out if array nodes null:

$fillcount = 0; foreach ($arrdata $key => $value) {     if (!is_null($value)) $fillcount++; }  if ($fillcount <= 0) {     // nothing useful in array } else {     // useful content in array }