--TEST-- output buffering - stati --INI-- opcache.optimization_level=0 --FILE-- <?php $stati = array(); function oh($str, $flags) { global $stati; $stati[] = "$flags: $str"; return $str; } ob_start("oh", 3); echo "yes"; echo "!\n"; ob_flush(); echo "no"; ob_clean(); echo "yes!\n"; echo "no"; ob_end_clean(); print_r($stati); ?> --EXPECT-- yes! yes! Array ( [0] => 1: yes [1] => 4: ! [2] => 2: no [3] => 0: yes! [4] => 10: no )