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<flushob_end_clean>
^Output Control FunctionsLast updated: Mon, 26 Oct 2026

ob_clean

(PHP 4 >= 4.2.0, PHP 5, PHP 7, PHP 8)

ob_clean — Clean (erase) the contents of the active output buffer

Description

function ob_clean(): bool

This function calls the output handler (with the PHP_OUTPUT_HANDLER_CLEAN flag), discards it's return value and cleans (erases) the contents of the active output buffer.

This function does not turn off the active output buffer like ob_end_clean() or ob_get_clean() does.

ob_clean() will fail without an active output buffer started with the PHP_OUTPUT_HANDLER_CLEANABLE flag.

Parameters

This function has no parameters.

Return Values

Returns true on success or false on failure.

Errors/Exceptions

If the function fails it generates an E_NOTICE.

See Also

  • ob_start() - Turn on output buffering
  • ob_get_contents() - Return the contents of the output buffer
  • ob_end_clean() - Clean (erase) the contents of the active output buffer and turn it off
  • ob_get_clean() - Get the contents of the active output buffer and turn it off
  • ob_flush() - Flush (send) the return value of the active output handler


<flushob_end_clean>
^Output Control FunctionsLast updated: Mon, 26 Oct 2026