如何通过动态键循环PHP对象

我尝试使用PHP解析JSON文件。但我现在被困住了。

这是我JSON文件的内容:

{
    "John": {
        "status":"Wait"
    },
    "Jennifer": {
        "status":"Active"
    },
    "James": {
        "status":"Active",
        "age":56,
        "count":10,
        "progress":0.0029857,
        "bad":0
    }
}

这是我目前为止所做的尝试:

<?php

$string = file_get_contents("/home/michael/test.json");
$json_a = json_decode($string, true);

echo $json_a['John'][status];
echo $json_a['Jennifer'][status];

但是因为我事先不知道名字(如“John”，“Jennifer”)和所有可用的键和值(如“age”，“count”)，我认为我需要创建一些foreach循环。

我希望你能举个例子。

当前回答

要遍历多维数组，可以使用RecursiveArrayIterator

$jsonIterator = new RecursiveIteratorIterator(
    new RecursiveArrayIterator(json_decode($json, TRUE)),
    RecursiveIteratorIterator::SELF_FIRST);

foreach ($jsonIterator as $key => $val) {
    if(is_array($val)) {
        echo "$key:\n";
    } else {
        echo "$key => $val\n";
    }
}

输出:

John:
status => Wait
Jennifer:
status => Active
James:
status => Active
age => 56
count => 10
progress => 0.0029857
bad => 0

在代码板上运行

2010-12-03 08:27:14

其他回答

试一试:

foreach ($json_a as $key => $value)
 {
   echo $key, ' : ';
   foreach($value as $v)
   {
       echo $v."  ";
   }
}

2013-05-31 11:56:30

<?php
$json = '{
    "response": {
        "data": [{"identifier": "Be Soft Drinker, Inc.", "entityName": "BusinessPartner"}],
        "status": 0,
        "totalRows": 83,
        "startRow": 0,
        "endRow": 82
    }
}';
$json = json_decode($json, true);
//echo '<pre>'; print_r($json); exit;
echo $json['response']['data'][0]['identifier'];
$json['response']['data'][0]['entityName']
echo $json['response']['status']; 
echo $json['response']['totalRows']; 
echo $json['response']['startRow']; 
echo $json['response']['endRow']; 

?>

2018-04-03 10:10:01

Try

<?php
$string = file_get_contents("/home/michael/test.json");
$json_a = json_decode($string,true);

foreach ($json_a as $key => $value){
  echo  $key . ':' . $value;
}
?>

2010-12-03 08:17:37

最优雅的解决方案:

$shipments = json_decode(file_get_contents("shipments.js"), true);
print_r($shipments);

请记住，json文件必须使用UTF-8编码，不包含BOM。如果文件有BOM，那么json_decode将返回NULL。

另外:

$shipments = json_encode(json_decode(file_get_contents("shipments.js"), true));
echo $shipments;

2014-12-17 13:30:02

要遍历多维数组，可以使用RecursiveArrayIterator

$jsonIterator = new RecursiveIteratorIterator(
    new RecursiveArrayIterator(json_decode($json, TRUE)),
    RecursiveIteratorIterator::SELF_FIRST);

foreach ($jsonIterator as $key => $val) {
    if(is_array($val)) {
        echo "$key:\n";
    } else {
        echo "$key => $val\n";
    }
}

输出:

John:
status => Wait
Jennifer:
status => Active
James:
status => Active
age => 56
count => 10
progress => 0.0029857
bad => 0

在代码板上运行

2010-12-03 08:27:14

如何通过动态键循环PHP对象

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