在PHP页面上从JSON获取数据有问题 - Problem getting data from JSON on PHP page

Problem getting data from JSON on PHP page

本文关键字：JSON 获取数据有问题 PHP | 更新日期: 2023-09-27

我发送这样的请求

$.ajax({
    url: 'php_scripts/reload_fancoils.php',
    type: 'POST',
    dataType: 'json',
    data:parameters,
    success: function(data){
        //alert(data);
        console.log(data);
    },
    error:function (xhr, ajaxOptions, thrownError){
        alert('statusText='+xhr.statusText+' responseText='+xhr.responseText);
    }   
});

，其中参数为

{
    "command": "write_plan_to_db",
    "fan_coil_id": 44444,
    "plan": {
        "points": {
            "mon": [
                "{'"start_time'":0, '"end_time'":840,'"mode'":0}",
                "{'"start_time'":840, '"end_time'":1440,'"mode'":2}"
            ],
            "tue": [
                "{'"start_time'":0, '"end_time'":1440,'"mode'":0}"
            ],
            "wed": [
                "{'"start_time'":0, '"end_time'":1440,'"mode'":1}"
            ],
            "thu": [
                "{'"start_time'":0, '"end_time'":1440,'"mode'":2}"
            ],
            "fri": [
                "{'"start_time'":0, '"end_time'":1440,'"mode'":4}"
            ],
            "sat": [
                "{'"start_time'":0, '"end_time'":1440,'"mode'":0}"
            ],
            "sun": [
                "{'"start_time'":0, '"end_time'":1440,'"mode'":1}"
            ]
        },
        "modes": {
            "mode_1": {
                "temperature_set_point": 18,
                "max_positive_variation": 0,
                "min_positive_variation": 0,
                "max_fan_speed": 4
            },
            "mode_2": {
                "temperature_set_point": 18,
                "max_positive_variation": 0,
                "min_positive_variation": 0,
                "max_fan_speed": 4
            },
            "mode_3": {
                "temperature_set_point": 18,
                "max_positive_variation": 0,
                "min_positive_variation": 0,
                "max_fan_speed": 4
            },
            "mode_4": {
                "temperature_set_point": 18,
                "max_positive_variation": 0,
                "min_positive_variation": 0,
                "max_fan_speed": 4
            },
            "mode_5": {
                "temperature_set_point": 18,
                "max_positive_variation": 0,
                "min_positive_variation": 0,
                "max_fan_speed": 4
            }
        }
    }
}

如何在服务器端读取'mode_1'的值，php页面

使用json_decode函数，例如

$var = json_decode($_POST['parameters']);
var_dump($var);

$plan = json_decode($_POST['plan']);
$mode1 = $plan->modes->mode_1;