Question

Here is my array ouput

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

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

foreach ($array as $key => $value) {
    if (empty($value))
        echo "$key empty <br/>";
    else
        echo "$key not empty <br/>";
}

My out put showing all is not empty. What is correct way to check is empty?

Answer 1

It works as expected, third one is empty

http://codepad.org/yBIVBHj0

Maybe try to trim its value, just in case that third value would be just a space.

foreach ($array as $key => $value) {
    $value = trim($value);
    if ($value === '')
        echo "$key is empty <br/>";
    else
        echo "$key is not empty <br/>";
}

Or to make it a function

function arrayHasEmptyValue(array $array) {    
    foreach ($array as $value) {
        if (trim($value) === '') {
            return true;
        }
    }
    return false;
}