如何在PHP中从多维数组中获取两个随机条目

我正在寻找一种方法来获取一个多维数组，并从顶层随机选择2个条目来创建一个新的多维数组。

例如，如果我有一个数组$data，它看起来如下：

array (size=3)
  0 => 
    array (size=1)
      0 => 
        object(stdClass)[500]
          public 'id' => int 2
          public 'first_name' => string 'Mary' (length=4)
          public 'last_name' => string 'Sweet' (length=5)
  1 => 
    array (size=1)
      0 => 
        object(stdClass)[501]
          public 'id' => int 9
          public 'first_name' => string 'Joe' (length=3)
          public 'last_name' => string 'Bob' (length=3)
  2 => 
    array (size=1)
      0 => 
        object(stdClass)[502]
          public 'id' => int 1
          public 'first_name' => string 'Shag' (length=4)
          public 'last_name' => string 'Well' (length=4)

我如何把它切开，从三个随机条目中取两个，得到类似$data2:的东西

array (size=2)
  0 => 
    array (size=1)
      0 => 
        object(stdClass)[500]
          public 'id' => int 2
          public 'first_name' => string 'Mary' (length=4)
          public 'last_name' => string 'Sweet' (length=5)
  1 => 
    array (size=1)
      0 => 
        object(stdClass)[502]
          public 'id' => int 1
          public 'first_name' => string 'Shag' (length=4)
          public 'last_name' => string 'Well' (length=4)