Description:
------------
I have a legacy PHP4 application running under PHP5 with additional components built in Zend Framework. Several of the legacy classes utilize call-time pass-by-reference when invoking their methods, for historical reasons, which is deprecated behavior in PHP5 and displays a message of level E_WARNING, appropriately:

Warning: Call-time pass-by-reference has been deprecated; If you would like to pass it by reference, modify the declaration of [runtime function name](). If you would like to enable call-time pass-by-reference, you can set allow_call_time_pass_reference to true in your INI file in /path/to/script.php on line ##

I have set and confirmed the error reporting bitmask at 6133 (all minus E_NOTICE and E_WARNING) via .htaccess directives (php_value) and PHP's error_reporting() function. However, I continue to see the warning message on my local development machine. Setting the prescribed ini setting seems to be the only way to suppress the warnings. Are these not regular E_WARNING level messages?

Reproduce code:
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<?php

error_reporting(6133);

function something ( $argument )
{
    echo 'I do nothing...';
} // END something

$variable = '123';

something(&$variable);

Expected result:
----------------
I do nothing...

Actual result:
--------------
Warning: Call-time pass-by-reference has been deprecated; If you would like to pass it by reference, modify the declaration of [something](). If you would like to enable call-time pass-by-reference, you can set allow_call_time_pass_reference to true in your INI file in /path/to/script.php on line 11