搜索JSON PHP

我有这样的JSON（为了可读性而缩短）：

我有一个PHP变量，它等于三个ID中的一个。我需要在JSON中搜索

id

，并返回本地化名称。这就是我目前正在尝试的

$heroid = $myplayer['hero_id'];

$heroes = file_get_contents("data/heroes.json");
$heroesarray = json_decode($heroes, true);

foreach ($heroesarray as $parsed_key => $parsed_value) {
        if ($parsed_value['id'] == $heroid) {
    $heroname = $parsed_value['localized_name'];
    }
}

获取JSON字符串并（如果第二个参数为

true

）将其转换为关联数组。然后，我们使用循环遍历这些数据，直到找到您想要的英雄

$json = ''; // JSON string
$data = json_decode($json, true);

foreach($data['heroes'] as $hero) {
    if($hero['id'] === 2) {
        var_dump($hero['localized_name']);
        // Axe

        // This will stop the loop, if you want to keep going remove this line
        break;
    }
}

简单。就用吧。解释遵循底部的代码

// First set the ID you want to look for.
$the_id_you_want = 2;

// Next set the $json.
$json = <<<EOT
{
    "heroes": [
         {
            "name": "antimage",
            "id": 1,
            "localized_name": "Anti-Mage"
        },
        {
            "name": "axe",
            "id": 2,
            "localized_name": "Axe"
        },
        {
            "name": "bane",
            "id": 3,
            "localized_name": "Bane"
        }
    ]
}
EOT;

// Now decode the json & return it as an array with the `true` parameter.
$decoded = json_decode($json, true);

// Set to 'TRUE' for testing & seeing what is actually being decoded.
if (FALSE) {
  echo '<pre>';
  print_r($decoded);
  echo '</pre>';
}

// Now roll through the decoded json via a foreach loop.
foreach ($decoded as $decoded_array_key => $decoded_array_value) {
  // Since this json is an array in another array, we need anothe foreach loop.
  foreach ($decoded_array_value as $decoded_key => $decoded_value) {
    // Do a comparison between the `$decoded_value['id']` and $the_id_you_want
    if ($decoded_value['id'] == $the_id_you_want) {
      echo $decoded_value['localized_name'];
    }
  }
}

首先你有一个数组，它可以等同于

$decoded[0]

，然后在下面你有另一个数组，它等同于

$decoded[0]['heros']

，然后在其中有一个数组，它包含的值的结构为

$decoded[0]['heros'][0]

，

$decoded[0]['heros'][1]

，

$decoded[0][“英雄”][2]

---

但解决这个问题的关键是

print\u r（$decoded）

帮助我查看JSON的更大结构。

使用

foreach

循环并遍历解码的数组。到目前为止，您尝试了什么？使用json_decode函数将json转换为PHP数组。查看示例代码，您遇到了与我相同的错误。您还有1个级别的数组数据要滚动。看看我的答案。在上面的示例中，尝试将

foreach（$heroesarray

更改为

foreach（$heroesarray[0]

）。我的答案通过另一个循环来实现相同的目标。这对我不起作用，我将用我正在尝试的内容编辑上面的帖子。@ChrisByatt好的。现在尝试一下。它应该可以正常工作。将编辑并给出解释。

// First set the ID you want to look for.
$the_id_you_want = 2;

// Next set the $json.
$json = <<<EOT
{
    "heroes": [
         {
            "name": "antimage",
            "id": 1,
            "localized_name": "Anti-Mage"
        },
        {
            "name": "axe",
            "id": 2,
            "localized_name": "Axe"
        },
        {
            "name": "bane",
            "id": 3,
            "localized_name": "Bane"
        }
    ]
}
EOT;

// Now decode the json & return it as an array with the `true` parameter.
$decoded = json_decode($json, true);

// Set to 'TRUE' for testing & seeing what is actually being decoded.
if (FALSE) {
  echo '<pre>';
  print_r($decoded);
  echo '</pre>';
}

// Now roll through the decoded json via a foreach loop.
foreach ($decoded as $decoded_array_key => $decoded_array_value) {
  // Since this json is an array in another array, we need anothe foreach loop.
  foreach ($decoded_array_value as $decoded_key => $decoded_value) {
    // Do a comparison between the `$decoded_value['id']` and $the_id_you_want
    if ($decoded_value['id'] == $the_id_you_want) {
      echo $decoded_value['localized_name'];
    }
  }
}

Array
(
    [heroes] => Array
        (
            [0] => Array
                (
                    [name] => antimage
                    [id] => 1
                    [localized_name] => Anti-Mage
                )

            [1] => Array
                (
                    [name] => axe
                    [id] => 2
                    [localized_name] => Axe
                )

            [2] => Array
                (
                    [name] => bane
                    [id] => 3
                    [localized_name] => Bane
                )

        )

)