How to parse this multi-dimensional array properly-CodePudding

I have tried everything I know and I have failed totally to parse this multi dimensional array so that I can get the "symbol" keys and corresponding values of "contractType" , but I can't seem to get it.

The array is generated here: https://fapi.binance.com/fapi/v1/exchangeInfo So I am doing the following:

    $curl = curl_init();
    curl_setopt($curl, CURLOPT_URL, $url);
    curl_setopt($curl, CURLOPT_RETURNTRANSFER, true);
    curl_setopt($curl, CURLOPT_HEADER, false);
    $data = curl_exec($curl);
    curl_close($curl);

    $results = [];
    foreach ($data['symbols'] as $info) {
        $results[] = $info['symbol'];        
    }
    print_r($results);

I tried a foreach loop, for loop, tried various offsets eg. $data[0]['symbols'].. to $data[9]['symbols'] etc. but can't seem to get the correct array offset.

10000"}],"symbols":[{"symbol":"BTCUSDT","pair":"BTCUSDT","contractType":"PERPETUAL","deliveryDate

I'm trying to loop through the "symbols" offset within this main array, and get 1. the "symbol" 2. its corresponding "contractType"

Ty..

CodePudding user response：

It doesn't work because the CURL result is in JSON.

You got to convert it to an array before you can loop through it.

$data = json_decode($data, true);

CodePudding user response：

It looks like you need to convert the JSON response into an array before you loop over it.

    $curl = curl_init();
    curl_setopt($curl, CURLOPT_URL, $url);
    curl_setopt($curl, CURLOPT_RETURNTRANSFER, true);
    curl_setopt($curl, CURLOPT_HEADER, false);
    $data = curl_exec($curl);
    curl_close($curl);

    $results = [];
    $data = json_decode($data);
    $i = 0;
    foreach ($data->symbols as $info) {
        $results[$i]['symbol'] = $info->symbol;
        $results[$i]['contractType'] = $info->contractType;
        $i  ;    
    }
    print_r($results);

CodePudding user response：

Yes. Thankyou.. (didn't understand answer properly.)

    $url = 'https://fapi.binance.com/fapi/v1/exchangeInfo';
    $curl = curl_init();
    curl_setopt($curl, CURLOPT_URL, $url);
    curl_setopt($curl, CURLOPT_RETURNTRANSFER, true);
    curl_setopt($curl, CURLOPT_HEADER, false);
    $data = curl_exec($curl);
    curl_close($curl);

    $data = json_decode($data, true);

    $results = [];
    $symbols = $data['symbols'];
    $i = 0;
    foreach ($symbols as $info) {
        $results[$i]['symbol'] = $info['symbol'];
        $results[$i]['contractType'] = $info['contractType'];
        $i  ;    
    }
    print_r($results);

Much appreciated, ty..