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>LXXV. Output Control Functions</H1
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> The Output Control functions allow you to control when output is
sent from the script. This can be useful in several different
situations, especially if you need to send headers to the browser
after your script has began outputing data. The Output Control
functions do not affect headers sent using
<A
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>header()</B
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only functions such as <A
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> and data between
blocks of PHP code.
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>Ejemplo 1. Output Control example</B
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><?php
ob_start();
echo "Hello\n";
setcookie ("cookiename", "cookiedata");
ob_end_flush();
?></PRE
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> In the above example, the output from <A
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>echo()</B
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>
would be stored in the output buffer until
<A
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><B
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>ob_end_flush()</B
></A
> was called. In the mean time,
the call to <A
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><B
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>setcookie()</B
></A
> successfully stored a
cookie without causing an error. (You can not normally send
headers to the browser after data has already been sent.)
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> See also <A
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>header()</B
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> and
<A
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><DT
><A
HREF="function.flush.html"
>flush</A
> -- Flush the output buffer</DT
><DT
><A
HREF="function.ob-clean.html"
>ob_clean</A
> --
Clean (erase) the output buffer
</DT
><DT
><A
HREF="function.ob-end-clean.html"
>ob_end_clean</A
> --
Clean (erase) the output buffer and turn off output buffering
</DT
><DT
><A
HREF="function.ob-end-flush.html"
>ob_end_flush</A
> --
Flush (send) the output buffer and turn off output buffering
</DT
><DT
><A
HREF="function.ob-flush.html"
>ob_flush</A
> --
Flush (send) the output buffer
</DT
><DT
><A
HREF="function.ob-get-contents.html"
>ob_get_contents</A
> --
Return the contents of the output buffer
</DT
><DT
><A
HREF="function.ob-get-length.html"
>ob_get_length</A
> --
Return the length of the output buffer
</DT
><DT
><A
HREF="function.ob-get-level.html"
>ob_get_level</A
> --
Return the nesting level of the output buffering mechanism
</DT
><DT
><A
HREF="function.ob-get-status.html"
>ob_get_status</A
> --
Get status of output buffers
</DT
><DT
><A
HREF="function.ob-gzhandler.html"
>ob_gzhandler</A
> --
ob_start callback function to gzip output buffer
</DT
><DT
><A
HREF="function.ob-implicit-flush.html"
>ob_implicit_flush</A
> --
Turn implicit flush on/off
</DT
><DT
><A
HREF="function.ob-start.html"
>ob_start</A
> -- Turn on output buffering</DT
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