Recursive empty

is_empty.php

$field1 = array(
	array('field_14' => null, 'field_21' => array(array('field_22' => null, 'field_23' => null, 'field_24' => null)), 'field_19' => null, 'field_20' => null)
);

$field2 = array();

$field3 = array('field' => 'test');

$field4 = 'coucou';


function is_empty($field) {
	$isEmpty = empty($field);
	if($isEmpty || !is_array($field)) {
		return $isEmpty;
	}

	return array_reduce($field, function($acc, $value){
		if ($acc === false) {
			return false;
		}
		
		return (is_array($value)) ? is_empty($value) : empty($value);
	});
}

var_dump(is_empty($field1));
var_dump(is_empty($field2));
var_dump(is_empty($field3));
var_dump(is_empty($field4));

##RESULT
bool(true)
bool(true)
bool(false)
bool(false)