Description:
------------
On the contrary to the tip in the documentation (http://www.php.net/manual/en/function.var-dump.php), there's no chance to stop var_dump() from outputting. Although you can save it with output buffering into a string, it will be sent to output, anyway...
As you can see in the example, the var_dump()-output is sent to output twice, first from var_dump(9), second from echo $output.

Reproduce code:
---------------
<pre>
<?php
$a = 'Output';
echo 'Output from var_dump():'."\n";
ob_start();
var_dump($a);
$output = ob_get_flush();
echo 'Same as above: '."\n".$output;
?>
</pre>

Expected result:
----------------
<pre>
Output from var_dump():

Same as above: 
string(6) "Output"
</pre>

Actual result:
--------------
<pre>
Output from var_dump():
string(6) "Output"
Same as above: 
string(6) "Output"
</pre>