PHP：如何在保持值不变的情况下从关联数组中删除键

Question

I have an array like this.

array('root'=> array(
      'auth'=>'stringKey',
       'version'=>'4057',
       '...'=>'...'
  )
  )

Now I want to remove the outer array and root key and so I get array like below. i.e reduce it to one dimensional array

array(
  'auth'=>'stringKey',
   'version'=>'4057',
   '...'=>'...'
)

Answer 1

$array = array(
      'root'=> array(
           'auth'=>'stringKey',
           'version'=>'4057',
           '...'=>'...'
       )
);

print_r($array['root']);