What are the potential drawbacks of using ob_start() to cache output in PHP when dealing with cookies?

Potential drawbacks of using ob_start() to cache output when dealing with cookies include the possibility of buffering content that includes cookie headers, leading to errors or unexpected behavior when setting cookies. To solve this issue, you can use ob_end_clean() to discard the buffer before setting cookies.

ob_start();

// Output content here

ob_end_clean();

// Set cookies here