insert image into mysql
http://www.ej38.com/askshow/php-mysql-216313.html
http://hi.baidu.com/my_labs/blog/item/e0a8c716f1a7840fc93d6dab.html
http://www.w3school.com.cn/php/php_file_upload.asp
http://www.white-hat-web-design.co.uk/blog/resizing-images-with-php/
http://www.360doc.com/content/09/0921/09/111404_6239790.shtml
http://hi.baidu.com/61894739/blog/item/a3378f0f49a1e6206059f3bb.html