如何检查数组值是否为空？

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 (empty($value))
        echo "$key empty <br/>";
    else
        echo "$key not empty <br/>";
}