Description:
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According to http://php.net/manual/en/function.ob-end-clean.php: The output buffer must be started by ob_start() with PHP_OUTPUT_HANDLER_CLEANABLE and PHP_OUTPUT_HANDLER_REMOVABLE flags. Otherwise ob_end_clean() will not work.

However, ob_end_clean() seems to work with only PHP_OUTPUT_HANDLER_REMOVABLE.

According to http://php.net/manual/en/function.ob-end-flush.php: The output buffer must be started by ob_start() with PHP_OUTPUT_HANDLER_FLUSHABLE and PHP_OUTPUT_HANDLER_REMOVABLE flags. Otherwise ob_end_flush() will not work.

However, ob_end_flush() seems to work with only PHP_OUTPUT_HANDLER_REMOVABLE.

The test script below shows the problem with ob_end_clean(). To see the problem with ob_end_flush(), simply replace ob_end_clean() with ob_end_flush().


Test script:
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ob_start(null, 0, PHP_OUTPUT_HANDLER_REMOVABLE);
echo "1";
ob_end_clean();
echo "2";


Expected result:
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A notice from ob_end_clean() and output "12"

Actual result:
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Output "2"