/**
* Tests if an array is associative or not.
*
* @param array array to check
* @return boolean
*/
public static function is_assoc(array $array)
{
// Keys of the array
$keys = array_keys($array);
// If the array keys of the keys match the keys, then the array must
// not be associative (e.g. the keys array looked like {0:0, 1:1...}).
return array_keys($keys) !== $keys;
}
