Php 从JSON回显值

我已经解码了JSON，但我无法回显单个值。 我想从“事务”数组中打印“ref”

我使用了以下命令，但无法打印最后一个命令。空出来了

  var_dump($response);
  echo "METHOD: ". $response["method"]; // Access Array data
  echo "TRACE: ". $response["trace"]; // Access Array data
  echo "REF: ". $response["transaction"]["ref"]; // Access Array data

---

提前感谢。

如果您格式化转储文件，您将在中看到：

$response[“order”][“transaction”][“ref”]

  var_dump($response);
  echo "METHOD: ". $response["method"]; // Access Array data
  echo "TRACE: ". $response["trace"]; // Access Array data
  echo "REF: ". $response["transaction"]["ref"]; // Access Array data

array(3) { 
["method"]=> string(5) "check" 
["trace"]=> string(19) "4000/22390/5f67437b" 
["order"]=> array(11) { 
  ["ref"]=> string(64) "E35B2D1E4F7A28B9F7D397B22FFB84B75EFB3DB091B91540CA0B759924EA378E" 
  ["cartid"]=> string(19) "18460_5f67381dec52e"
  ["test"]=> int(1) 
  ["amount"]=> string(6) "545.00" 
  ["currency"]=> string(3) "AED"
  ["description"]=> string(22) "Your order from Baaqah"
  ["status"]=> array(2) { 
    ["code"]=> int(3)
    ["text"]=> string(4) "Paid"
  } 
  ["transaction"]=> array(7) { 
     ["ref"]=> string(12) "030025829659" 
     ["date"]=> string(21) "20 Sep 2020 15:08 GST" 
     ["type"]=> string(4) "sale" 
     ["class"]=> string(4) "ECom" 
     ["status"]=> string(1) "A" 
     ["code"]=> string(6) "909959" 
     ["message"]=> string(10) "Authorised" 
   }
}