无法使用php从JSON文件中正确读取

I am trying to read from a JSON file into a PHP array and then echo the array's content, so I can fetch the info with ajax in javascript and convert the array in javascript to an array of JSON objects.

我试图从JSON文件读取到PHP数组,然后回显数组的内容,所以我可以用javascript中的ajax获取信息,并将javascript中的数组转换为JSON对象数组。

Here is how my JSON file looks like.

这是我的JSON文件的样子。

[["{\"id\":1474541876849,\"name\":\"D\",\"price\":\"12\"}"],["{\"id\":1474541880521,\"name\":\"DD\",\"price\":\"12\"}"],["{\"id\":1474541897705,\"name\":\"DDDGG\",\"price\":\"124\"}"],["{\"id\":1474541901141,\"name\":\"FAF\",\"price\":\"124\"}"],["{\"id\":1474543958238,\"name\":\"tset\",\"price\":\"6\"}"]]

Here is my php :

这是我的PHP:

<?php
$string = file_get_contents("products.json");
$json_a = json_decode($string, true);

$arr = array();
foreach ($json_a as $key) {
    array_push($arr,$key[0]);


}
foreach ($arr as $key) {
    echo $key;
}
?>

And this is what I am getting on the client side :

这就是我在客户端获得的:

{"id":1474541876849,"name":"D","price":"12"}{"id":1474541880521,"name":"DD","price":"12"}{"id":1474541897705,"name":"DDDGG","price":"124"}{"id":1474541901141,"name":"FAF","price":"124"}{"id":1474543958238,"name":"tset","price":"6"}

It looks like I am not that far, but what can I do so I can actually make this a JSON object?

看起来我不是那么远,但是我能做什么才能让它成为JSON对象呢?

Please help!

1 个解决方案

#1

The problem is that you have JSON inside JSON.

问题是你在JSON中有JSON。

you have to decode twice:

你必须解码两次:

<?php
$string = file_get_contents("products.json");
$json_a = json_decode($string, true); //here you turn a JSON-string into an array containing JSON-strings

$arr = array();
foreach ($json_a as $key) {
    array_push($arr,json_decode($key[0],true)); //and here you turn each of those JSON-strings into objects themselves


}

echo json_encode($arr);

gives me this:

给我这个:

[{
    "id": 1474541876849,
    "name": "D",
    "price": "12"
}, {
    "id": 1474541880521,
    "name": "DD",
    "price": "12"
}, {
    "id": 1474541897705,
    "name": "DDDGG",
    "price": "124"
}, {
    "id": 1474541901141,
    "name": "FAF",
    "price": "124"
}, {
    "id": 1474543958238,
    "name": "tset",
    "price": "6"
}]

which is valid JSON itself and probably what you want.

这是有效的JSON本身,可能你想要的。

#1