如何在PHP中訪問JSON數組

Question

我試圖通過ajax將多部分數組傳遞給PHP函數。

這是我的JS：

var datastring = {
        newEmailForm: newEmailForm,
        properties: properties
    };

    //got the data, make the ajax request
    jQuery(function(){
        jQuery.ajax({
            type:'POST',
            data:{
                action: 'elegantSendEmail',
                datastring: datastring
            },
            url: ajaxurl
        })
    })

這是要發送的數組：

action  elegantSendEmail
  datastring[newEmailForm][0][] {…}
    0   email
    1   title
    2   Message
  datastring[properties][0][]   {…}
    0   31466
    1   value1
    2   value1
  datastring[properties][1][]   {…}
    0   31440
    1   value2
    2   value2

這是我嘗試通過PHP進行嘗試的嘗試，但我的響應中什么也沒有。

function elegantSendEmail(){
   var_dump($_POST);
  wp_die();
}

這是從控制台進行轉儲的結果：

array(2) { 
  ["action"]=> string(16) "elegantSendEmail" 
  ["datastring"]=> array(1) { 
    ["newEmailForm"]=> array(1) { 
     [0]=> array(3) { 
      [0]=> string(5) "email" 
      [1]=> string(5) "title" 
      [2]=> string(17) "Youe message here" 
      } 
     } 
    } 
  } 

Answer 1

更多信息如何使用json_decode訪問數據

$obj = json_decode($_POST['datastring']['newEmailForm'][0], true);

Answer 2

嘗試這個

function elegantSendEmail() {
 $obj = $_POST['datastring']['newEmailForm'][0][0];
 var_dump($obj);
 //Above dump shows 'email'
 wp_die(); 
}

Answer 3

您需要在ajax中以正確的json格式發送數據。 例如

{
    "id": "0001",
    "type": "donut",
    "name": "Cake",
    "ppu": 0.55,
    "batters":
        {
            "batter":
                [
                    { "id": "1001", "type": "Regular" },
                    { "id": "1002", "type": "Chocolate" },
                    { "id": "1003", "type": "Blueberry" },
                    { "id": "1004", "type": "Devil's Food" }
                ]
        },
    "topping":
        [
            { "id": "5001", "type": "None" },
            { "id": "5002", "type": "Glazed" },
            { "id": "5005", "type": "Sugar" },
            { "id": "5007", "type": "Powdered Sugar" },
            { "id": "5006", "type": "Chocolate with Sprinkles" },
            { "id": "5003", "type": "Chocolate" },
            { "id": "5004", "type": "Maple" }
        ]
}

Answer 4

因此，根據您的答案以及$_POST結果在var_dump之后，我們看到您傳遞了一個數組而不是json對象。 因此，您可以像訪問普通數組一樣訪問它的字段。

$obj=$_POST['datastring']['newEmailForm'][0][0]  // will get you the email

$obj=$_POST['datastring']['newEmailForm'][0][1]  // will get you the title

$obj=$_POST['datastring']['newEmailForm'][0][2]  // will get you the message