php数组使用多维数组合并键

This is my array:

这是我的阵列:

array 
  0 => 
    array 
      'id' => int 220950
      'order_reference' => string '600125479' 
  1 => 
    array 
      'id' => int 220985
      'order_reference' => string '498638' 
array 
  0 =>