ob_gzhandler

ob_start callback function to gzip output buffer

&reftitle.description; ``string``false```ob_gzhandler` `string` `data` `int` `flags`

`ob_gzhandler` is intended to be used as a callback function for `ob_start` to help facilitate sending gz-encoded data to web browsers that support compressed web pages. Before `ob_gzhandler` actually sends compressed data, it determines what type of content encoding the browser will accept ("gzip", "deflate" or none at all) and will return its output accordingly. All browsers are supported since it's up to the browser to send the correct header saying that it accepts compressed web pages. If a browser doesn't support compressed pages this function returns &false;.

&reftitle.parameters;

`data`

`flags`

&reftitle.returnvalues;

&reftitle.examples;

### `ob_gzhandler` example

    <?php

    ob_start("ob_gzhandler");

    ?>
    <html>
    <body>
    <p>This should be a compressed page.</p>
    </body>
    </html>

&reftitle.notes;

`ob_gzhandler` requires the zlib extension.

You cannot use both `ob_gzhandler` and zlib.output_compression. Also note that using zlib.output_compression is preferred over `ob_gzhandler`.

&reftitle.seealso;

- `ob_start`
- `ob_end_flush`