ob_flush

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

    ob_flush — Flush (send) the return value of the active output handler

    Description

    ob_flush(): bool

    This function calls the output handler (with the PHP_OUTPUT_HANDLER_FLUSH flag), flushes (sends) its return value and discards the contents of the active output buffer.

    This function does not turn off the active output buffer like ob_end_flush() or ob_get_flush() does.

    ob_flush() will fail without an active output buffer started with the PHP_OUTPUT_HANDLER_FLUSHABLE 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_flush() - Flush (send) the return value of the active output handler and turn the active output buffer off
    • ob_get_flush() - Flush (send) the return value of the active output handler, return the contents of the active output buffer and turn it off
    • ob_clean() - Clean (erase) the contents of the active output buffer

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