How to make two dimensional array's value blank?

Hello. I want to make two dimensional array's value blank. How can I do this? For example $email[1]['name']. I want that $email Array should have blank value. Thanks in advance.

 

$email[1]['name'] = "";

 

just use blank key []

$email[]['name'] = '';
$email[]['name'] = '';
$email[]['name'] = '';

 

If you want a function to handle it all, I wrote this:

function array_update($array) {

foreach($array as $key => $value) {

if (is_array($array[$key]))
$array[$key] = array_update($array[$key]);
else
$array[$key] = '';

}

return $array;
}