php开发，请教大家商城图片是怎么解决
php开发，请问大家商城图片是如何解决？
情况是这样的。。。
商城中某商品，在前台的设计中，图片大小分为四种类型，即
1.small_pic，就是最小的图，用在下定单，或者侧栏显示
2.list_pic,栏目列表及首页列表展示的图片
3.goods_show_pic,用于商品展示页面的图，利用js可以放大，放大的图就是下面所要说的图，原始尺寸的图片
4.original_pic，原始图片，规定好尺寸，用来被放大
这样的图片，我的想法，是通过原始图片，缩三次，成为三张不同尺寸的图片，跟sina博客一般的
我不知道这样的方法可不可行，还是说，让设计师做好除原始图另外三张图，再分别上传？
大家谈谈自己的创意及做法，谢谢先。。。
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上传一张原图。用程序自动生成多张需要的缩略图。这是比较实用的方法。
若果每次上传都需要传几张照片。那工作量大了点。还要劳烦美工那边动工。实在有失效率呀！
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好吧。当我没说。
------解决方案--------------------
我觉得还是设置尺寸比较省事
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想要高质量的图片肯定需要GD2的resize来裁剪图片，而且单纯用CSS定义的话，小图没什么问题，大图的话会影响整站的加载速度，多几张图片就把你网站搞垮
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