How to remove empty values from multidimensional array in PHP?

The following function worked for my case. We can use a simple recursive function to remove all empty elements from the multidimensional PHP array:

function array_filter_recursive($input){
    foreach ($input as &$value){
        if (is_array($value)){
            $value = array_filter_recursive($value);
        }
    }
    return array_filter($input);
}

Then we just need to call this function:

$myArray = array_filter_recursive($myArray);

Not sure if this is exactly what your looking for.

function array_remove_null($array) {
    foreach ($array as $key => $value)
    {
        if(is_null($value))
            unset($array[$key]);
        if(is_array($value))
            $array[$key] = array_remove_null($value);
    }
    return $array;
}

Update (corrections):

function array_remove_null($array) {
    foreach ($array as $key => $value)
    {
        if(is_null($value))
            unset($array[$key]);
        if(is_string($value) && empty($value))
            unset($array[$key]);
        if(is_array($value))
            $array[$key] = array_remove_null($value);
        if(isset($array[$key]) && count($array[$key])==0)
            unset($array[$key]);
    }
    return $array;
}

I'm sure better checking and making this more robust might help the solution.

Bit late, but may help someone looking for same answer. I used this very simple approach to;

1. remove all the keys from nested arrays that contain no value, then
2. remove all the empty nested arrays.

---

$postArr = array_map('array_filter', $postArr);
$postArr = array_filter( $postArr );