Fetch Ticker

<?php
// ##########################################
// for asynchronous (async/await) version check: https://github.com/ccxt/ccxt/blob/master/examples/php/async-await.php
// ##########################################

include dirname(dirname(dirname(__FILE__))) . '/ccxt.php';
date_default_timezone_set('UTC');

$exchange = new \ccxt\okx(array(
   // 'verbose' => true, // for debugging
   'timeout' => 30000,
));

// If you want to use test-mode (a.k.a. sandbox), uncomment the following line:
// $exchange->set_sandbox_mode(true); 

$symbol = 'ETH/USDT';

try {
   if (array_key_exists($symbol, $exchange->markets)) {
       $market = $exchange->market($symbol);
   } else {
       echo $exchange->id . ' does not have market symbol ' . $symbol . "; Supported symbols:\n";
       echo print_r($exchange->symbols, true) . "\n";
       exit();
   }
   if($market['active']) {
       $result = $exchange->fetch_ticker($symbol);
       echo "Ticker: " . $result['symbol'] . ', 24hr high: '. $result['high']. "\n";
   } else {
       echo $exchange->id . ' market ' . $symbol . " is not active!\n";
   }
} catch (Exception $e) {
   if ($e instanceof \ccxt\NetworkError) {
       echo '[Network Error] ' . $e->getMessage() . "\n";
   } else {
       echo '['. get_class($e) . '] ' . $e->getMessage() . "\n";
   }
}