koteq/disable_output_buffering.php

## disable_output_buffering.php
<?php

// http/1.1 header to disable browsers cache
header('Cache-Control: no-cache');

// tell nginx to disable buffering
header('X-Accel-Buffering: no');

// disable apache mod_gzip and mod_deflate
apache_setenv('no-gzip', 1);

// disable builtin php's gzip
ini_set('zlib.output_compression', 0);

// it's sad to know, but it's imposible to change output_buffering by using ini_set
// ini_set('output_buffering', 0);

// tell php to call flush() after each output
// ini_set('implicit_flush', true);  // seems ob_implicit_flush is better choise
ob_implicit_flush(true);

// close all started output buffers
while (ob_get_level()) {
    ob_end_clean();
}

// here it is, unstopable unbuffered output
// but remember to send 512 bytes to browser
// or explicitly set page encoding
header('Content-Type: text/html; charset=utf-8');
?>
<!DOCTYPE HTML>
<html>
<head>
    <title>Buffering Disabled</title>
    <script>
        var scrollInterval = setInterval("window.scrollBy(0, 1000);", 100);
    </script>
</HEAD>
<head>
<h2>Appears first, then waiting</h2>
<?
for ($i = 1; $i < 6; $i++) {
    echo "Wait $i sec...<br>\n";
    sleep(1);
}
?>
Done!
<script>
    window.scrollBy(0, 1000);
    clearInterval(scrollInterval);
</script>
</body>
</html>
	<?php

	// http/1.1 header to disable browsers cache
	header('Cache-Control: no-cache');

	// tell nginx to disable buffering
	header('X-Accel-Buffering: no');

	// disable apache mod_gzip and mod_deflate
	apache_setenv('no-gzip', 1);

	// disable builtin php's gzip
	ini_set('zlib.output_compression', 0);

	// it's sad to know, but it's imposible to change output_buffering by using ini_set
	// ini_set('output_buffering', 0);

	// tell php to call flush() after each output
	// ini_set('implicit_flush', true); // seems ob_implicit_flush is better choise
	ob_implicit_flush(true);

	// close all started output buffers
	while (ob_get_level()) {
	ob_end_clean();
	}

	// here it is, unstopable unbuffered output
	// but remember to send 512 bytes to browser
	// or explicitly set page encoding
	header('Content-Type: text/html; charset=utf-8');
	?>
	<!DOCTYPE HTML>
	<html>
	<head>
	<title>Buffering Disabled</title>
	<script>
	var scrollInterval = setInterval("window.scrollBy(0, 1000);", 100);
	</script>
	</HEAD>
	<head>
	<h2>Appears first, then waiting</h2>
	<?
	for ($i = 1; $i < 6; $i++) {
	echo "Wait $i sec...<br>\n";
	sleep(1);
	}
	?>
	Done!
	<script>
	window.scrollBy(0, 1000);
	clearInterval(scrollInterval);
	</script>
	</body>
	</html>