How to delete key from array and update index?
===

    
    $array = array('a', 'b','c');
    unset($array[0]);
    var_dump($array);

    Yields:
    array(1) {
      [1]=>
      'b'
      'c'
    }

How do I, remove array[0] to get ['bb','cc'] (no empty keys):

    array(1) {
      'b'
      'c'
    }