在CakePHP 2.1插件中使用App ::(而不是App :: import)

api文档说the following主题：

All classes that were loaded in the past using App::import(‘Core’,$class) will need to be loaded using App::uses() referring to the correct package. This change has provided large performance gains to the framework.

• The method no longer looks for classes recursively,it strictly uses
  the values for the paths defined in App::build()
• It will not be able to load App::import('Component','Component') use App::uses('Component','Controller');.
• Using App::import('Lib','CoreClass'); to load core classes is no longer possible. Importing a non-existent file,supplying a wrong type or package name,or null values for $name and $file parameters will result in a false return value.
• App::import('Core','CoreClass') is no longer supported,use App::uses() instead and let the class autoloading do the rest.
• Loading vendor files does not look recursively in the vendors folder,it will also not convert the file to underscored anymore as it did in the past.

迁移指南还有some things to say关于App：uses(),并且是将2.0的最佳实践与1.3及更低版本的较旧方法进行比较的良好起点.

This related question处理在Cake 2.0中加载供应商文件,我无法验证JoséLorenzo的声明：App：import()是require_once()的“傻包装”,也不是包含文件的首选方式的声明.我可以找到的唯一的参考是在Coding Standards的蛋糕贡献者,即开发人员为Cake的核心做贡献,而不是构建在框架上的应用程序.

编辑

假设您要导入Twitter OAuth library,驻留在vendor / twitter中,主要类文件是vendor / twitter / twitteroauth / twitteroauth.PHP中的twitteroauth.PHP：

App::import('vendor','twitteroauth',array('file' => 'twitter'.DS.'twitteroauth'.DS.'twitteroauth.PHP'));