ob_clean in PHP

ob_clean — Clean (erase) the output buffer
Syntax: 

void ob_clean ( void )
This function discards the contents of the output buffer.

This function does not destroy the output buffer like ob_end_clean() does.

The output buffer must be started by ob_start() with PHP_OUTPUT_HANDLER_CLEANABLE flag. Otherwise ob_clean() will not work.

Return Values:

No value is returned.