Image upload component (cakephp)

原文出处：
http://labs.iamkoa.net/2007/10/23/image-upload-component-cakephp/

非常感谢Ben Borowski的fine work，在CakePHP中上传图片就像踢小孩屁股一样容易。我已经在几个项目中使用这个组件了,可以说这就是规则。
学习如何使用他，喜欢他，编写他。
Dropping The Knowledge (pretext)
使用这个组件是最简单并且允许你输入选项来定制图片。
/*
  * upload
  * - handle uploads of any type
  * @ file - a file (file to upload) $_FILES[FILE_NAME]
  * @ path - string (where to upload to)
  * @ name  [optional] - override the default file name
  * @ rules [optional] - how to handle file types
  * - rules['type'] = string ('resize','resizemin','resizecrop','crop')
  * - rules['size'] = array (x, y) or single number
  * - rules['output'] = string ('gif','png','jpg')
  * - rules['quality'] = integer (quality of output image)
  * @ allowed [optional] - allowed filetypes array
  * - default: array ('jpg','jpeg','gif','png')
  * ex:
  * $result = $this->Upload->upload($file, 'uploads', null, array('type' => 'resizecrop', 'size' => array('400', '300'), 'output' => 'jpg'));
  *