src/Util/JsonDecoder.php
public static function decode($string, $asArray)
    {
        if (version_compare(PHP_VERSION, '5.4.0', '>=') && !(defined('JSON_C_VERSION') && PHP_INT_SIZE > 4)) {
            return json_decode($string, $asArray, 512, JSON_BIGINT_AS_STRING);
        }

        return json_decode($string, $asArray);
    }
public static function decode($string, $asArray)
    {
        if (version_compare(PHP_VERSION, '5.4.0', '>=') && !(defined('JSON_C_VERSION') && PHP_INT_SIZE > 4)) {
            return json_decode($string, $asArray, 512, JSON_BIGINT_AS_STRING);
        }

        return json_decode($string, $asArray);
    }
Decodes a JSON string to stdObject or associative array

@param string $string
@param bool   $asArray

@return array|object