Is there a way to loop through a multidimensional array without knowing it's depth?

Question

So far, if I have to loop through a multidimensional array, I use a foreach loop for each dimension.

e.g for two dimensions

foreach($array as $key=&g         


        

Answer 1

Simple function inside array_walk_recursive to show the level of nesting and the keys and values:

array_walk_recursive($array, function($v, $k) {
                                 static $l = 0;
                                 echo "Level " . $l++ . ": $k => $v\n";
                             });

Another one showing use with a reference to get a result:

array_walk_recursive($array, function($v) use(&$result) {
                                 $result[] = $v;
                             });