Use ThinkPHP to generate and display thumbnails and thinkphp thumbnails.

Use ThinkPHP to generate and display thumbnails and thinkphp thumbnails.

First, understand some functions in the parent class Image. class. php (ThinkPHP/Library/Think/Image. class. php ).

1: open () open the processed image

2: Create a thumbnail of thumb () by default, and scale proportionally to 1 (for meanings of 2, 3, 4, 5, and 6, see the parent class file Image. class. php)

3: save () thumbnails to the server

To generate a thumbnail, follow these steps:

* 1. instantiation
* 2. open the image open ()
* 3. Generate the default proportional scaling of the thumbnail thumb ()
* 4. save ()

Controller code:

// Large image path (for details about the large image path, refer to the upload path for "using ThinkPHP to upload attachments" in the previous article)

$ Bigimg_path = $ upload-> rootPath. $ file_info ['savepath']. $ file_info ['savename']; // the path of the thumbnail $ smallimg_path = $ upload-> rootPath. $ file_info ['savepath']. 'Small _'. $ file_info ['savename']; $ img = new \ Think \ Image (); // instantiate $ img-> open ($ bigimg_path ); // open the processed image $ img-> thumb (100,100); // create a thumbnail (100*100) $ img-> save ($ smallimg_path ); // Save the thumbnail to the server // Save the uploaded attachment and thumbnail to the database $ _ POST ['goods _ big_img '] = $ bigimg_path; $ _ POST ['goods _ small_img '] = $ smallimg_path;

Constant set in the entry file

For the convenience of displaying the thumbnail path on the foreground, set a constant in index. php of the entrance file, indicating the site path, and splice it with the image path stored in the database

define('SITE_URL', 'http://www.tp.com/TP/shop/');

Big image and thumbnail displayed on the front-end

<Td> <! -- Big chart --> < {$ v. goods_big_img}> "height =" 60 "width =" 60 "> </td> <! -- Thumbnail --> < {$ v. goods_small_img}> "height =" 40 "width =" 40 "> </td>

Result

Database storage path

Image

Front-end display