There are two error in the new PHP eclass. First the --with-mime-magic option changed in 4.3.2 to --enable-mime-magic. (http://www.php.net/manual/en/ref.mime-magic.php) Second the --with-wddx option has always been --enable-wddx. (http://www.php.net/manual/en/ref.wddx.php)
Sorry, --enable-mime-magic changed to --with-mime-magic ;D
fixed in CVS.