循环遍历json文件以在PHP中查找特定值

Question

My json file look likes

myjson.json

[
{"name":"category_01","data":
[
{"id":"1","word":"ma","given_value":"1"},
{"id":"3","word":"me","given_value":"1"},
] }
[
{"name":"category_02","data":
[
{"id":"1","word":"vea","given_value":"1"},
{"id":"3","word":"ve","given_value":"1"},
] }

So what I want here is, check whether a particular value is in this json array using php. Assume that,

myphp.php

$word = 've';

if this value is in the above array, should find is it in category_01 or category_02. and also want to find given_value of matching word. I just tried in this way,

$data = file_get_contents ("myjson.json");
$json = json_decode($data, true);

foreach($arr as $item) { 
$uses = ($item['word']= $word); 
}

This doesn't work. How can I fix this, Please help me!

Answer 1

First of all, the JSON you posted is invalid. I think it should look like this:

[
    {
        "name": "category_01",
        "data": [{
                "id": "1",
                "word": "ma",
                "given_value": "1"
            },
            {
                "id": "3",
                "word": "me",
                "given_value": "1"
            }
        ]
    },
    {
        "name": "category_02",
        "data": [{
                "id": "1",
                "word": "vea",
                "given_value": "1"
            },
            {
                "id": "3",
                "word": "ve",
                "given_value": "1"
            }
        ]
    }
]

Try using on online tool like https://jsonlint.com/ to check your JSON. (if you get errors i recommend build the json again from scratch).

I also recommend checking your json before using it:

if ($arr === null && json_last_error() !== JSON_ERROR_NONE) {
    die("incorrect json data");
}

To get your value you have to KNOW how your data looks like and then process it:

foreach($arr as $category) { 
    foreach($category['data'] as $data) { 
        if(strstr($data['word'], $word))
        echo $category['name'].' '.$data['word'].' '.$data['given_value']."
";
    }
}