这是默认的bootstrap文件，并且在unset之前有这么一段：\/\/ CLEANUP - remove items from global scope\/\/ This will clear all our local boostrap variables from the global scope of \/\/ this script (and any scripts that called bootstrap).??This will enforce \/\/ object retrieval through the Applications\\'s Registry使应用从对象注册表获取对象实例。前面registry只有这三行：[ol][*]# $registry = Zend_Registry::getInstance();[*]# $registry->configuration = $configuration;[*]# $registry->dbAdapter? ???= $dbAdapter;[\/ol]那么之前的语句做什么用？
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