for循环中的多维PHP数组作为JSON答案

【问题标题】：Multidimensional PHP array in for loop as JSONfor循环中的多维PHP数组作为JSON
【发布时间】：2016-07-09 10:14:18
【问题描述】：

我无法将我的 php 数组显示为 json 对象。我想在 php for 循环中用数据库中的数据填充数组，这样我就可以用它制作一个 json 对象，这样我就可以在 javascript 中使用它了。

当我使用 GetJSON 在控制台中记录数据时，它不会显示像“id”这样的数据，但是当我在 php.ini 中回显 JSON 时它会显示出来。 'name' 中的值在 for 循环之外填充，以测试我的数组是否作为 json 对象工作。

<script type='text/javascript'>
    $(document).ready(function(){

      $.getJSON('database/getTourInfo.php', function(data) {
        console.log(data);
          $.each(data, function(key, val) {
            console.log(val.show.name);
          });
      });

    });
  </script>

这是 getTourInfo.php。当我在 for 循环之外填充数组的值时，它将在控制台中输出（参见 'name' ）。但是当我将它填充到如下所示的 for 循环中时，它会在我回显它时出现在 JSON 中，但不会显示在控制台中。

<?php

header("Content-type: text/javascript");

$x = 0;
$tourInfo  = array();
$tourInfo_array = array (
  "show"      => array(
          "id" => "", 
          "name" => "Naam1", 
          "date" => "", 
          "support" => "", 
          "festival" => ""
  ),
  "location"  => array(
          "latitude" => "",
          "longitude" => ""
  ),
  "venue"     => array(
          "name" => "", 
          "space" => "", 
          "capacity" => ""
  ),
  "people"    => array(
          "attending" => "",
           "interested" => ""
  )        
);

$tourdates = json_decode( $tourdatesJSON, true );
foreach($tourdates as $tourdate) { 
  $x++;

  $event_page_id  = $tourdate['ShowEventpage'];
  $festival       = $tourdate['ShowFestival'];
  $support        = $tourdate['ShowVoorprogramma'];

  $tourdates_array[$x]["show"]["id"] = $event_page_id;
  $tourdates_array[$x]["show"]["support"] = $support;
  $tourdates_array[$x]["show"]["festival"] = $festival;

  array_push($tourInfo, $tourInfo_array[$x]);

}

$tourInfoJSON = json_encode($tourInfo, JSON_PRETTY_PRINT);
echo $tourInfoJSON;
?>

如何在 for 循环中填充我的多维数组并使用 getJSON 将其输出为 json？

【问题讨论】：

$.getJSON() 期待Content-Type: application/json，不是吗？变量$tourdatesJSON 来自哪里？
这是另一个来自数据库的 JSON 对象，我已将其包含在 HTML 的中。我已将内容类型更改为 application/json 但没有结果。
$tourInfo_array[$x] 没有定义 - 你的代码有点混乱，你能简化一下吗？

标签： php arrays json multidimensional-array getjson

【解决方案1】：

你试过了吗？

header('Content-Type: application/json');

echo json_encode($tourInfo, JSON_PRETTY_PRINT);

【讨论】：

【解决方案2】：

从查询的预期输出来看，我认为您的构造有点错误。

试试这个；

<?php

$tourdate = array(
  '2016-03-01' => array(
    'ShowEventpage' => '1',
    'ShowFestival' => 'Isle of Wight',
    'ShowVoorprogramma' =>'N'
    ),
  '2016-04-01' => array(
    'ShowEventpage' => '2',
    'ShowFestival' => 'V Festival',
    'ShowVoorprogramma' =>'N'
    ),
  '2016-05-01' => array(
    'ShowEventpage' => '3',
    'ShowFestival' => 'Glastonbury',
    'ShowVoorprogramma' =>'Y'
    ),
  '2016-06-01' => array(
    'ShowEventpage' => '4',
    'ShowFestival' => '1Xtra',
    'ShowVoorprogramma' =>'Y'
    ),
  '2016-07-01' => array(
    'ShowEventpage' => '5',
    'ShowFestival' => 'Party in the Park',
    'ShowVoorprogramma' =>'N'
    )
  );

$tourdatesJSON = json_encode($tourdate);


$x = 0;
$tourInfo  = array();
$tourInfo_array = array (
  "location"  => array(
          "latitude" => "",
          "longitude" => ""
  ),
  "venue"     => array(
          "name" => "", 
          "space" => "", 
          "capacity" => ""
  ),
  "people"    => array(
          "attending" => "",
           "interested" => ""
  )        
);

$tourdates = json_decode( $tourdatesJSON, true );
$tourdates_array = array();

$i = intval(0);
foreach($tourdates as $date)
{ //Foreach through list of dates

    $tourdates_array[] = array(
      'show' => array(
        'id' => $date['ShowEventpage'],
        'support' => $date['ShowVoorprogramma'],
        'festival' => $date['ShowFestival']
        ),
        "location"  => array(
                "latitude" => "",
                "longitude" => ""
        ),
        "venue"     => array(
                "name" => "", 
                "space" => "", 
                "capacity" => ""
        ),
        "people"    => array(
                "attending" => "",
                 "interested" => ""
        )  
    );    
    $i++;
}

$tourInfoJSON = json_encode($tourdates_array, JSON_PRETTY_PRINT);


header("Content-type: application/json");
echo $tourInfoJSON;
?>

这是我在命令行上运行时得到的；

[
    {
        "show": {
            "id": "1",
            "support": "N",
            "festival": "Isle of Wight"
        },
        "location": {
            "latitude": "",
            "longitude": ""
        },
        "venue": {
            "name": "",
            "space": "",
            "capacity": ""
        },
        "people": {
            "attending": "",
            "interested": ""
        }
    },
    {
        "show": {
            "id": "2",
            "support": "N",
            "festival": "V Festival"
        },
        "location": {
            "latitude": "",
            "longitude": ""
        },
        "venue": {
            "name": "",
            "space": "",
            "capacity": ""
        },
        "people": {
            "attending": "",
            "interested": ""
        }
    },
    {
        "show": {
            "id": "3",
            "support": "Y",
            "festival": "Glastonbury"
        },
        "location": {
            "latitude": "",
            "longitude": ""
        },
        "venue": {
            "name": "",
            "space": "",
            "capacity": ""
        },
        "people": {
            "attending": "",
            "interested": ""
        }
    },
    {
        "show": {
            "id": "4",
            "support": "Y",
            "festival": "1Xtra"
        },
        "location": {
            "latitude": "",
            "longitude": ""
        },
        "venue": {
            "name": "",
            "space": "",
            "capacity": ""
        },
        "people": {
            "attending": "",
            "interested": ""
        }
    },
    {
        "show": {
            "id": "5",
            "support": "N",
            "festival": "Party in the Park"
        },
        "location": {
            "latitude": "",
            "longitude": ""
        },
        "venue": {
            "name": "",
            "space": "",
            "capacity": ""
        },
        "people": {
            "attending": "",
            "interested": ""
        }
    }
]

您所做的主要问题是您正在定义$tourInfo_array 数组，然后尝试向其中添加信息。因此，当您尝试从那里输出数组时，您最初放入数组中的所有内容仍保持原样，并且循环只是将新条目添加到底部。

我希望这会有所帮助。

【讨论】：