Yandex speller

        function isError($text)
        {
            $text = urlencode(implode('+', explode(' ', $text)));
            $data = json_decode(file_get_contents('http://speller.yandex.net/services/spellservice.json/checkText?text='.$text), true);
            if(count($data)){
                $errors = [];
                foreach ($data as $word){
                    $errors[$word['word']] = $word['s'];
                }
                return $errors;
            }
            return false;
        }