PHP - 如何将数组的空值移动到其最后位置

Question

How can I move the empty values of an array to its last position?

For example:

$givenArray = array( 
                    0=>'green', 
                    1=>'', 
                    2=>'red', 
                    3=>'', 
                    4=>'blue'
                  );

$requiredArray = array(
                       0=>'green',
                       1=>'red',
                       2=>'blue',
                       3=>'',
                       4=>'' 
                      );

Provided that the non empty values should not be sorted. It should be as it is, i.e. only the empty values should move to the end of an array.

I need exactly what my examples show.

Answer 1

There are much better/more elegant answers in this thread already, but this works too:

//strip empties and move to end
foreach ($givenArray as $key => $value)
{ 
    if ($value === "")
    { 
        unset($givenArray[$key]);
        $givenArray[] = $value;
    }
}

// rebuild array index
$givenArray = array_values($givenArray);

Codepad demo