What are the potential pitfalls of using ob_start() and ob_end_clean() in PHP for caching?

Using ob_start() and ob_end_clean() in PHP for caching can lead to potential pitfalls such as increased memory usage and potential conflicts with other output buffering functions. To avoid these issues, it is recommended to use ob_get_contents() to capture the output buffer contents and store them in a variable before clearing the buffer with ob_end_clean().

ob_start();
// Output your content here

$content = ob_get_contents();
ob_end_clean();

// Use $content for caching or further processing