在PHP中合并两个JSON对象

Question

我有两个JSON对象。 这是第一个JSON

{
 "listings": [
        {
          "city": "Kingsland",
        "subdivision": "Kingsland Cove"
        }
  ]
}

这是第二个JSON：

{
     "listings": [
            {
              "city": "Sunrise Beach",
        "subdivision": "Sunrise Beach"
            }
      ]
    }

如何在PHP中合并这两个代码并产生

{
   "listings": [
       {
   "city": "Kingsland",
   "subdivision": "Kingsland Cove"
       },
       {
   "city": "Sunrise Beach",
   "subdivision": "Sunrise Beach"
       }
   ]
 }

请指导我。