[PHP-GTK-DEV] Undefined method: PangoFontDescription::free()

Hello:

I am using PHP-Gtk2 to develop software to control a motorsports scoreboard. 
I have the most recent versions of every piece of the puzzle (php-gtk2, GTK+
bundle) and am running on WinXP 32-bit.

Upon attempting to use the command $pfd -> free() on a PangoFontDescription
named $pfd, I encounter the error

[17-Jul-2009 10:51:10] PHP Fatal error:  Call to undefined method
PangoFontDescription::free() in D:\Documents and Settings ... on line 58

This command appears in all PHP-Gtk2 references.  Why does it remain
"undefined" to my compiler?  The static pango_font_descriptions_free() is
also undefined, and I cannot ref() or unref() my PangoLayouts, either, even
though they are GObjects.

The need for these commands stems from an object I have defined, "Textbox",
which takes as input a width/height array, some text, a font family, and a
desired maximum font size.  It creates a PangoFontDescription and a
PangoLayout and then resets the size of the PangoFontDescription downward
until the PangoLayout fits inside the width and height specified.  The size
is checked via PangoLayout -> get_pixel_size.  My program crashes after
several hundred resizings; when the resizing is omitted, my program can
create tens of thousands of Textboxes without incident.  I surmise that it
is the font-resize---modify layout---get_pixel_size cycle that is causing
the crash.  

Does anyone have an idea for a more efficient/less memory-intensive
algorithm?  Is there a PHP-Gtk2 command I'm missing?  

Thanks for any assistance you can provide.

Jon
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