FLUSH(3) 1 FLUSH(3)flush - Flush system output bufferSYNOPSIS
void flush (void )
DESCRIPTION
Flushes the system write buffers of PHP and whatever backend PHP is using (CGI, a web server, etc). This attempts to push current output
all the way to the browser with a few caveats.
flush(3) may not be able to override the buffering scheme of your web server and it has no effect on any client-side buffering in the
browser. It also doesn't affect PHP's userspace output buffering mechanism. This means you will have to call both ob_flush(3) and flush(3)
to flush the ob output buffers if you are using those.
Several servers, especially on Win32, will still buffer the output from your script until it terminates before transmitting the results to
the browser.
Server modules for Apache like mod_gzip may do buffering of their own that will cause flush(3) to not result in data being sent immedi-
ately to the client.
Even the browser may buffer its input before displaying it. Netscape, for example, buffers text until it receives an end-of-line or the
beginning of a tag, and it won't render tables until the </table> tag of the outermost table is seen.
Some versions of Microsoft Internet Explorer will only start to display the page after they have received 256 bytes of output, so you may
need to send extra whitespace before flushing to get those browsers to display the page.
RETURN VALUES
No value is returned.
SEE ALSO ob_flush(3), ob_clean(3), ob_end_flush(3), ob_end_clean(3).
PHP Documentation Group FLUSH(3)
Check Out this Related Man Page
OB_GZHANDLER(3) 1 OB_GZHANDLER(3)ob_gzhandler - ob_start callback function to gzip output bufferSYNOPSIS
string ob_gzhandler (string $buffer, int $mode)
DESCRIPTION ob_gzhandler(3) is intended to be used as a callback function for ob_start(3) to help facilitate sending gz-encoded data to web browsers
that support compressed web pages. Before ob_gzhandler(3) 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.
PARAMETERS
o $buffer
-
o $mode
-
RETURN VALUES EXAMPLES
Example #1
ob_gzhandler(3) example
<?php
ob_start("ob_gzhandler");
?>
<html>
<body>
<p>This should be a compressed page.</p>
</body>
</html>
NOTES
Note
ob_gzhandler(3) requires the zlib extension.
Note
You cannot use both ob_gzhandler(3) and zlib.output_compression. Also note that using zlib.output_compression is preferred over
ob_gzhandler(3).
SEE ALSO ob_start(3), ob_end_flush(3).
PHP Documentation Group OB_GZHANDLER(3)
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