改变magento的核心配置数据--core config data

$inchooSwitch = new Mage_Core_Model_Config();
/*
*turns notice on
*/
$inchooSwitch ->saveConfig( 'design/head/demonotice' , "1" , 'default' , 0);
/*
*turns notice off
*/
$inchooSwitch ->saveConfig( 'design/head/demonotice' , "0" , 'default' , 0);