18. Magento 细节

1. Magento 配置文件加载严格按字母顺序，除了模块依赖关系

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2. global 节点

main database settings,such as host,database name ,user name,password and some system values.connections types(read/write)database adaptercore module class names

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3. default 节点

directory structure real folder names.system localedesign and theme configurationsystem options

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4. frontend 节点

routerstranslations fileslayout xml filesobservers declarations

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5. catalog 节点

specific to a certain module.

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6. how to access to cinfiguration value

1.to get part of config:    $store->getConfig($path);2.to get part of config:    Mage::getStoreConfig($path[,$store]);3.to check store flag:    Mage::getStoreConfigFlag($path[,$store]);4.to access by absolute path:    Mage::getConfig()->getNode($path[,$scope]);

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Mage::getModel(URI); // 按URI寻找配置标签，然后实例化