How do I check if array value is empty?

Question

Here is my array ouput

Array
(
    [1] => 1
    [2] => 2
    [3] =>  
)

How do I know the [3] => is empty?

Answer 1

An other solution:

$array = array('one', 'two', '');

if(count(array_filter($array)) == count($array)) {
    echo 'OK';
} else {
    echo 'ERROR';
}

http://codepad.org/zF9KkqKl