sizeof(): Parameter must be an array or an object that implements Countable in1

• 

  PHP Warning: sizeof(): Parameter must be an array or an object that implements Countable in PHP Warning: sizeof(): Parameter must be an array or an object that implements Countable in sizeof()함수를 사용할 때 array 혹은 object타입인지 체크를 하지 않아서 생기는 오류. 예시) sizeof($string); // Bad; if(is_array($stirng) || is_object($stirng)){ sizeof($string); // Good! } Server Language/PHP 2020. 3. 10.