Magento: Mage::getResourceModel, Mage::getModel 和 Mage::getSingleton() 的区别 when
Perfectdifferecewithexampleforgetsingletonandgetmodel. Mage::getSingleton()Mage::getSingleton()willfirstcheckifthesameclassinstanceexistsornotinthememory.Iftheinstanceexiststhenitwillreturnthesameobje