dzarezenko/coinmarketcap-api

<?php
 
namespace coinmarketcap\api\tools;
 
/**
 * HTTP requests support class.
 *
 * @category CoinMarketCap API
 * @author Dmytro Zarezenko <dmytro.zarezenko@gmail.com>
 * @copyright (c) 2017, Dmytro Zarezenko
 *
 * @git https://github.com/dzarezenko/coinmarketcap-api
 * @license http://opensource.org/licenses/MIT
 */
class Request {
 
    /**
     * cURL handle.
     *
     * @var resource
     */
Avoid variables with short names like $ch. Configured minimum length is 3.
    private static $ch = null;
 
    /**
     * Executes curl request to the CoinMarketCap API.
     *
     * @param array $req Request parameters list.
     *
     * @return array JSON data.
     * @throws \Exception If Curl error or CoinMarketCap API error occurred.
     */
    public static function exec($url, array $req = []) {
        usleep(120000);
 
        // generate the POST data string
        $postData = http_build_query($req, '', '&');
 
        // curl handle (initialize if required)
        if (is_null(self::$ch)) {
            self::$ch = curl_init();
            curl_setopt(self::$ch, CURLOPT_RETURNTRANSFER, true);
            curl_setopt(
                self::$ch,
                CURLOPT_USERAGENT,
                'Mozilla/4.0 (compatible; CoinMarketCap PHP API; ' . php_uname('a') . '; PHP/' . phpversion() . ')'
            );
        }
        curl_setopt(self::$ch, CURLOPT_URL, $url . "?" . $postData);
        curl_setopt(self::$ch, CURLOPT_SSL_VERIFYPEER, false);
 
        // run the query
        $res = curl_exec(self::$ch);
        if ($res === false) {
Missing class import via use statement (line '54', column '23').
            throw new \Exception("Curl error: " . curl_error(self::$ch));
        }
 
        $json = json_decode($res, true);
 
        // Check for the CoinMarketCap API error
        if (isset($json['error'])) {
Missing class import via use statement (line '61', column '23').
            throw new \Exception("CoinMarketCap API error: {$json['error']}");
        }
 
        return $json;
    }
 
    /**
     * Executes simple GET request to the CoinMarketCap public API.
     *
     * @param string $url API method URL.
     *
     * @return array JSON data.
     */
    public static function json($url) {
        $opts = [
            'http' => [
                'method' => 'GET',
                'timeout' => 10
            ]
        ];
        $context = stream_context_create($opts);
        $feed = file_get_contents($url, false, $context);
        $json = json_decode($feed, true);
 
        return $json;
    }
 
}