Retrieve first element of JSON with php [duplicate] - php

Question

This question already has answers here:
Parsing JSON in PHP
(2 answers)
Closed 5 years ago.
I got a JSON from a web site in the raw format:
{"A_B":{"id":7,"last":"0.00000038"},"A_C":{"id":8,"last":"0.00001938"}, ... }
How do I get the A_B and A_C??? I do not know what A_B and A_C could be.

Answer 1

Try the following.
$json = file_get_contents("your json data");
$arr = json_decode($json, true);
foreach ($arr as $key=>$val) {
var_dump($key);
}
Finally, var_dump($key) displays A_B and A_C.

Answer 2

Suppose you have that raw json in some variable, say $yourJson
First, parse your json. $parsedJson = json_decode($yourJson, true)
Then run a foreach loop and stop after 2 iterations, You will (hopefully) get the right key-value pair.
$i = 0;
$extractedValues = [];
foreach ($parsedJson as $key => $value) {
$extractedValues[$key] = $value; $i++;
if ($i === 2) {
break;
}
}
Now, $extractedValues contains only two elements found from the first two iterations.

Answer 3

$data = json_decode("Your json variable");
foreach($data as $value){
echo $value; // here you receive your desire value.
}

Answer 4

Try this:
$json = '{"A_B":{"id":7,"last":"0.00000038"},"A_C":{"id":8,"last":"0.00001938"}}';
$dataArray = json_decode($json, true);
$arrayKeys = array_keys($dataArray); // in your case A_B and A_C
and if you want to get their values then:
foreach($dataArray as $data) {
foreach($data as $key => $value) {
echo $key . ": " . $value . PHP_EOL;
}
}

Answer 5

var $jsonObj = json_decode('{"A_B":{"id":7,"last":"0.00000038"}}')
print $jsonObj->{'A_B'}