ob_end_clean

    (PHP 4, PHP 5, PHP 7, PHP 8)

    ob_end_clean — Clean (erase) the contents of the active output buffer and turn it off

    Descrizione

    ob_end_clean(): bool

    This function calls the output handler (with the PHP_OUTPUT_HANDLER_CLEAN and PHP_OUTPUT_HANDLER_FINAL flags), discards it's return value, discards the contents of the active output buffer and turns off the active output buffer.

    ob_end_clean() will fail without an active output buffer started with the PHP_OUTPUT_HANDLER_REMOVABLE flag.

    ob_end_clean() will discard the contents of the active output buffer even if it was started without the PHP_OUTPUT_HANDLER_CLEANABLE flag.

    Elenco dei parametri

    Questa funzione non contiene parametri.

    Valori restituiti

    Restituisce true in caso di successo, false in caso di fallimento.

    Errori/Eccezioni

    If the function fails it generates an E_NOTICE.

    Esempi

    The following example shows an easy way to get rid of the contents of the active output buffer:

    Example #1 ob_end_clean() example

    <?php
    ob_start    ();
    echo     'Text that won\'t get displayed.';
    ob_end_clean();
    ?>

    Vedere anche:

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

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    User Contributed Notes 2 notes

    up
    8
    Sam Yong - hellclanner at live dot com
    14 years ago
    Take note that if you change zlib output compression setting in between ob_start and ob_end_clean or ob_end_flush, you will get an error: ob_end_flush() failed to delete buffer zlib output compression

    Example:

    <?php

    ob_start    ();

    $output = ob_get_contents();

    ini_set('zlib.output_compression', '1');

    ob_end_clean();

    ?>

    ob_end_clean(); in this example will throw the error.
    up
    7
    John Smith
    21 years ago
    Note that if you started called ob_start with a callback, that callback will still be called even if you discard the OB with ob_end_clean.

    Because there is no way of removing the callback from the OB once you've set it, the only way to stop the callback function from having any effect is to do something like:

    <?php
    $ignore_callback     = false;
    ob_start('my_callback');
    ...
    if(    $need_to_abort) {
    $ignore_callback = true;
    ob_end_clean();
    ...
    }

    function     my_callback(&$buffer) {
    if(    $GLOBALS['ignore_callback']) {
    return     "";
    }
    ...
    }
    ?>
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