John Davidson

arrays - get all similar keys in JSON object in PHP

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Message:


let say, i have this JSON data i want to print all key by name "id", what should i do?


$json = {"response":[
{
"id": 37,
"slug": "red",
"stock": true,
"name": "Red",
"default": 0,
"sizes": "38"
},
{
"id": 38,
"slug": "red",
"stock": true,
"name": "Red",
"default": 0,
"sizes": "40"
}
]}

i tried this but this one is only giving me first array object sub key(which is id=37) i want all like (id=37, id=38)


$op =  $json->{'response'}[0]->{'id'};


My Answer:
You can achieve this by decoding the JSON data into an associative array in PHP and then iterating over the keys to find all keys with a specific name. Here's an example code snippet to demonstrate this:

php
$jsonData = '{
"name": "John",
"age": 30,
"city": "New York",
"name": "Jane",
"occupation": "Engineer",
"name": "Alice"
}';

$data = json_decode($jsonData, true);

$searchKey = 'name';
$keys = array_keys($data, $searchKey);

foreach ($keys as $key) {
echo $key . PHP_EOL;
}


In this example, the JSON data contains multiple keys with the name "name". We decode the JSON data into an associative array and then use the `array_keys` function to find all keys with the name "name". Finally, we iterate over the keys and print them out.

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