重新排序数组以删除上级0索引

I'm wanting to know how I can reindex my array that has a upper level index [0]

My array looks like this

$test = array(
   [0] => array(
      id = 1
   )
)

What I want is

$test = array(
      id = 1
)

I know that I can do a foreach to get what I want, but wondering is there a function that does the samething.

This should do it with the example you gave:

$test = $test[0];

If your problem is more complex, tell us more.