Question

我是Json文件的新手。我想问一个关于如何从我的json文件中检索单个数据的问题，如

"common.ALLTYPES_HASHED_LEGACY_BLOB": [75,0,0,0,242,57,95,229,91,72,205,100,56]

我如何从我的json文件中获取该单个值？

这是我的Json文件：

    {
     "result": {
     "common.ALLTYPES_NAME": "",
     "common.ALLTYPES_DESCRIPTION": "",
     "common.ALLTYPES_HASHED_LEGACY_BLOB": [
      68,
      114,
      105
     ],
     "_datalogger": [
      {
        "common.ALLTYPES_NAME": "_DataLogger",
        "common.ALLTYPES_DESCRIPTION": "",
        "common.ALLTYPES_HASHED_LEGACY_BLOB": [
          2,
          0,
          0,
          0,
          93,
          130,
          13,
          199
        ],
        "log_groups": [
          {
            "common.ALLTYPES_NAME": "Datalog",
            "common.ALLTYPES_DESCRIPTION": "",
            "common.ALLTYPES_HASHED_LEGACY_BLOB": [
              164,
              0,
              0,
              0,
              133,
              183,
              237,
              140,
              108
            ],
            "table_aliases": [
              {
                "common.ALLTYPES_NAME": "__internal",
                "common.ALLTYPES_DESCRIPTION": "",
                "common.ALLTYPES_HASHED_LEGACY_BLOB": [
                  75,
                  0,
                  0,
                  0,
                  242,
                  57,
                  95,
                  229,
                  91,
                  72,
                  205,
                  100,
                  56
                ]
              }
            ],
            "triggers": [
              {
                "common.ALLTYPES_NAME": "Trigger",
                "common.ALLTYPES_DESCRIPTION": "",
                "common.ALLTYPES_HASHED_LEGACY_BLOB": [
                  109,
                  0,
                  0,
                  0,
                  85,
                  151,
                  173,
                  242
                ]
              }
            ],
            "log_items": [
               {
                "common.ALLTYPES_NAME": "Scada 3         Channel.ScadaDevice1.WM01_Speed",
                "common.ALLTYPES_DESCRIPTION": ""
              },
              {
                "common.ALLTYPES_NAME": "Scada 3    Channel.ScadaDevice1.WM02_Speed",
                "common.ALLTYPES_DESCRIPTION": ""
              },
              {
                "common.ALLTYPES_NAME": "Scada 3 Channel.ScadaDevice1.WM04_Speed",
                "common.ALLTYPES_DESCRIPTION": ""
              }
            ]
          }
        ]
      }
    ]
  }
}

Answer 1

以下是一个例子：

$var = '{
     "result": {
     "common.ALLTYPES_NAME": "",
     "common.ALLTYPES_DESCRIPTION": "",
     "common.ALLTYPES_HASHED_LEGACY_BLOB": [
      68,
      114,
      105
     ],
     "_datalogger": [
      {
        "common.ALLTYPES_NAME": "_DataLogger",
        "common.ALLTYPES_DESCRIPTION": "",
        "common.ALLTYPES_HASHED_LEGACY_BLOB": [
          2,
          0,
          0,
          0,
          93,
          130,
          13,
          199
        ],
        "log_groups": [
          {
            "common.ALLTYPES_NAME": "Datalog",
            "common.ALLTYPES_DESCRIPTION": "",
            "common.ALLTYPES_HASHED_LEGACY_BLOB": [
              164,
              0,
              0,
              0,
              133,
              183,
              237,
              140,
              108
            ],
            "table_aliases": [
              {
                "common.ALLTYPES_NAME": "__internal",
                "common.ALLTYPES_DESCRIPTION": "",
                "common.ALLTYPES_HASHED_LEGACY_BLOB": [
                  75,
                  0,
                  0,
                  0,
                  242,
                  57,
                  95,
                  229,
                  91,
                  72,
                  205,
                  100,
                  56
                ]
              }
            ],
            "triggers": [
              {
                "common.ALLTYPES_NAME": "Trigger",
                "common.ALLTYPES_DESCRIPTION": "",
                "common.ALLTYPES_HASHED_LEGACY_BLOB": [
                  109,
                  0,
                  0,
                  0,
                  85,
                  151,
                  173,
                  242
                ]
              }
            ],
            "log_items": [
               {
                "common.ALLTYPES_NAME": "Scada 3         Channel.ScadaDevice1.WM01_Speed",
                "common.ALLTYPES_DESCRIPTION": ""
              },
              {
                "common.ALLTYPES_NAME": "Scada 3    Channel.ScadaDevice1.WM02_Speed",
                "common.ALLTYPES_DESCRIPTION": ""
              },
              {
                "common.ALLTYPES_NAME": "Scada 3 Channel.ScadaDevice1.WM04_Speed",
                "common.ALLTYPES_DESCRIPTION": ""
              }
            ]
          }
        ]
      }
    ]
  }
}';

$res = json_decode($var, true);
print_r( $res['result']['_datalogger'][0]['log_groups'][0]['table_aliases'][0]['common.ALLTYPES_HASHED_LEGACY_BLOB'][0] );

如何解码我的json文件

1 个答案: