ob_get_status in PHP

ob_get_status — Get status of output buffers

ob_get_status(bool $full_status = false): array

ob_get_status() returns status information on either the top level output buffer or all active output buffer levels if full_status is set to true.

Array
(
    [level] => 2
    [type] => 0
    [status] => 0
    [name] => URL-Rewriter
    [del] => 1
)