ob flush example

ob_flush.php

<?php

/*
	== ob_end_flush() ==
	Flush (send) the output buffer and turn off output buffering

	== ob_end_clean() ==
	Clean (erase) the output buffer and turn off output buffering

	== ob_get_contents() ==
	Return the contents of the output buffer
*/


# The following two functions result in the same output.

function output_some_html_with_var() {
	ob_start();
	?>
	<p>This is a paragraph echoed from a variable.</p>
	<?php
	$para = ob_get_contents();
	ob_end_clean();
	echo $para;
}

function output_some_html_with_end_flush() {
	ob_start();
	?>
	<p>This is a paragraph sent with ob_end_flush.</p>
	<?php
	ob_end_flush();
}

output_some_html_with_var();

output_some_html_with_end_flush();

/*
	If you want to return the contents of ob_start()
	you should store ob_get_contents() into a variable,
	then call ob_end_clean(), and then return the variable.
*/

function return_some_html_with_var() {
	ob_start();
	?>
	<p>This is a paragraph being stored into a variable and returned.</p>
	<?php
	$para = ob_get_contents();
	ob_end_clean();
	return $para;
}

echo return_some_html_with_var();

echo '<a style="text-decoration:none;" href="http://php.net/manual/en/function.ob-start.php">See the ob_start documentiation for more info</a>';