Determine if all the values in a PHP array are null -


i'm looking performance friendly approach check if values in array null or if @ least has 1 element other types.

i.e. need method called containsonlynull($array), returns booleans according passed array

e.g. :

$a = containsonlynull([null,null,null,null,null]); $b = containsonlynull([null,null,1,null,null]);  // $a true // $b false

any advice appreciated :)

function containsonlynull($input) {     return empty(array_filter($input, function ($a) { return $a !== null;})); }

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