原理:設置apache rewrite ,當圖片不存在時,調用php創建圖片。
例如
原圖路徑為:http://localhost/upload/news/2013/07/21/1.jpg
縮略圖路徑為:http://localhost/supload/news/2013/07/21/1.jpg
當訪問 http://localhost/supload/news/2013/07/21/1.jpg 時,如圖片存在,則顯示圖片。否則,調用createthumb.php生成圖片。
目錄結構如下:
www/PicThumb.class.php
www/ThumbConfig.php
www/upload/news/2013/07/21/1.jpg
www/upload/article/2013/07/21/2.jpg
www/supload/.htaccess
www/supload/watermark.png
www/supload/createthumb.php
http://localhost/ 指向 www目錄
PicThumb.class.php 用法請查看這裡:http://blog.csdn.net/fdipzone/article/details/9316385
需要開啟apache rewrite
sudo a2enmod rewrite
.htaccess
<IfModule mod_rewrite.c> RewriteEngine On # '-s' (is regular file, with size) # '-l' (is symbolic link) # '-d' (is directory) # 'ornext|OR' (or next condition) # 'nocase|NC' (no case) # 'last|L' (last rule) RewriteCond %{REQUEST_FILENAME} -s [OR] RewriteCond %{REQUEST_FILENAME} -l [OR] RewriteCond %{REQUEST_FILENAME} -d RewriteRule ^.*$ - [NC,L] RewriteRule ^.*$ createthumb.php?path=%{REQUEST_URI} [NC,L] </IfModule>
createthumb.php
<?php define('WWW_PATH', dirname(dirname(__FILE__))); // 站點www目錄 require(WWW_PATH.'/PicThumb.class.php'); // include PicThumb.class.php require(WWW_PATH.'/ThumbConfig.php'); // include ThumbConfig.php $logfile = WWW_PATH.'/createthumb.log'; // 日志文件 $source_path = WWW_PATH.'/upload/'; // 原路徑 $dest_path = WWW_PATH.'/supload/'; // 目標路徑 $path = isset($_GET['path'])? $_GET['path'] : ''; // 訪問的圖片URL // 檢查path if(!$path){ exit(); } // 獲取圖片URI $relative_url = str_replace($dest_path, '', WWW_PATH.$path); // 獲取type $type = substr($relative_url, 0, strpos($relative_url, '/')); // 獲取config $config = isset($thumb_config[$type])? $thumb_config[$type] : ''; // 檢查config if(!$config || !isset($config['fromdir'])){ exit(); } // 原圖文件 $source = str_replace('/'.$type.'/', '/'.$config['fromdir'].'/', $source_path.$relative_url); // 目標文件 $dest = $dest_path.$relative_url; // 創建縮略圖 $obj = new PicThumb($logfile); $obj->set_config($config); if($obj->create_thumb($source, $dest)){ ob_clean(); header('content-type:'.mime_content_type($dest)); exit(file_get_contents($dest)); } ?>
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