CODEWITHSUNDEEP
phparraysjson
Thenis
Thenis

Reputation: 61

How to get specific keys from a json file with php

So I have this json file

[
    {
        "var1": "6",
        "var2": "13",
        "var3": "17"
    },
    {
        "var1": "9",
        "var2": "11",
        "var3": "6"
    }
]

How can I get only the values of var2 which are 13 and 11?

Upvotes: 1

Views: 3332

Answers (3)

Coloured Panda
Coloured Panda

Reputation: 3467

You can use json_decode alongside array_column, no need for unnecessary loops.

array_column(json_decode($json_string, true), 'var2'); // [13, 11]

For array_column the first argument is the array, second argument being the key you want to access.

json_decode the first argument is a string - your json. The second argument tells it to return an array and not stdClass.

http://php.net/manual/en/function.array-column.php

Upvotes: 3

user4962466
user4962466

Reputation:

You can use json_decode function, then use foreach to get the values you want

$data = json_decode("your.json");

foreach ($data as $obj) {
    print $obj->var2;
}

json_decode let you to choose the data format to be retrieved (object or associative array), if you prefer associative array style, just pass true as second parameter to json_decode

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

foreach ($data as $obj) {
    print $obj['var2'];
}

Upvotes: 1

Влад Чачиев
Влад Чачиев

Reputation: 33

use json_decode()

$json = '[{    "var1": "6",    "var2": "13",    "var3": "17"},{    "var1": "9",    "var2": "11",    "var3": "6"}];'
$array = json_decode ($json, true);
$values = [];
foreach ($array as $ar) {
    $values[] = $ar['var2'];
}
var_dump($values);

Upvotes: 1

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