如何在 PHP 中遍历这个 json 解码数据？
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How to loop through this json decoded data in PHP?
提问by Kaltsoon
I've have this list of products in JSON that needs to be decoded:
我有需要解码的 JSON 产品列表：
"[{"productId":"epIJp9","name":"Product A","amount":"5","identifier":"242"},{"productId":"a93fHL","name":"Product B","amount":"2","identifier":"985"}]"
After I decode it in PHP with json_decode(), I have no idea what kind of structure the output is. I assumed that it would be an array, but after I ask for count()it says its "0". How can I loop through this data so that I get the attributes of each product on the list.
在我用 PHP 解码后json_decode()，我不知道输出是什么类型的结构。我假设它是一个数组，但在我要求count()它之后说它是“0”。我如何遍历这些数据，以便获得列表中每个产品的属性。
Thanks!
谢谢！
回答by Josh M
To convert json to an array use
要将 json 转换为数组，请使用
json_decode($json, true);
回答by Josh M
You can use json_decode() It will convert your json into array.
您可以使用 json_decode() 它将您的 json 转换为数组。
e.g,
例如，
$json_array = json_decode($your_json_data); // convert to object array
$json_array = json_decode($your_json_data, true); // convert to array
Then you can loop array variable like,
然后你可以像这样循环数组变量，
foreach($json_array as $json){
echo $json['key']; // you can access your key value like this if result is array
echo $json->key; // you can access your key value like this if result is object
}
回答by Bora
Try like following codes:
尝试如下代码：
$json_string = '[{"productId":"epIJp9","name":"Product A","amount":"5","identifier":"242"},{"productId":"a93fHL","name":"Product B","amount":"2","identifier":"985"}]';
$array = json_decode($json_string);
foreach ($array as $value)
{
echo $value->productId; // epIJp9
echo $value->name; // Product A
}
Get Count
获取计数
echo count($array); // 2
回答by M1K1O
Did you check the manual ?
你看说明书了吗？
Or just find some duplicates ?
或者只是找到一些重复项？
Use GOOGLE.
使用谷歌。
json_decode($json, true);
Second parameter. If it is true, it will return array.
第二个参数。如果为真，它将返回数组。
回答by sven
You can try the code at php fiddle online, works for me
您可以在线尝试 php fiddle 上的代码，对我有用
$list = '[{"productId":"epIJp9","name":"Product A","amount":"5","identifier":"242"},{"productId":"a93fHL","name":"Product B","amount":"2","identifier":"985"}]';
$decoded_list = json_decode($list);
echo count($decoded_list);
print_r($decoded_list);
