具有卷曲问题的数字转换get-request

Curl Get-request return numeric vales with e-, but I need json string with normal numeric format or convert numeric e- to string full numeric value

<?php


$ch = curl_init();
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_ENCODING ,"");
curl_setopt($ch, CURLOPT_URL, "https://api.huobi.pro/market/tickers");

$json = curl_exec($ch);
curl_close($ch);

$obj = json_decode($json, true);

$curr_pairs = array("iotabtc","manabtc");

foreach ($obj['data'] as $tick_s){
    $huobi_curr_pair = $tick_s['symbol'];

    if (in_array($huobi_curr_pair, $curr_pairs,true)){
        $tick_string = json_encode($tick_s);
        echo $tick_string;  
    }
}

?>