ThinkPHP图片上传-php手册-php.cn

　　ThinkPHP是国内比较流行的轻量级的PHP框架,它在国内流行的一个最主要的因素在于它的说明文档非常健全完善，以及它源码内的注释都是中文的，方便于英语能力较差的程序员学习.

图片上传在网站里是很常用的功能.ThinkPHP里也有自带的图片上传类(UploadFile.class.php) 和图片模型类(Image.class.php)。方便于我们去实现图片上传功能.

1.我们首先需要创建一个表

<span 1</span> CREATE TABLE <span IF</span><span  NOT EXISTS `tp_image` (
</span><span 2</span>   `id` int(11) NOT <span NULL</span> AUTO_INCREMENT,
<span 3</span>   `image` varchar(200) NOT <span NULL</span>,
<span 4</span>   `create_time` int(11) NOT <span NULL</span>,
<span 5</span>   PRIMARY <span KEY</span><span  (`id`)
</span><span 6</span> ) ENGINE=MyISAM  <span DEFAULT</span> CHARSET=utf8;

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2.然后再conf文件里添加配置(最后一段配置是可选的,只是为了方便统一管理URL路径)

<?<span php
</span><span return</span> <span array</span><span (
        </span>'URL_MODEL'    =>    2, <span //</span><span  如果你的环境不支持PATHINFO 请设置为3</span>
        'DB_TYPE'    =>    'mysql',
        'DB_HOST'    =>    'localhost',
        'DB_NAME'    =>    'thinkphp',
        'DB_USER'    =>    'root',
        'DB_PWD'    =>    '',
        'DB_PORT'    =>    '3306',
        'DB_PREFIX'    =>    'tp_',
         
        'SHOW_PAGE_TRACE' =><span true</span>,        <span //</span><span 显示页面调试明细</span>
         
        'TMPL_PARSE_STRING' =>  <span array</span>( <span //</span><span  地址替换,用_UPLOAD_目录 代替 根目录下的Upload目录</span>
         '__UPLOAD__'    =>  __ROOT__.'/Uploads',<span 
     )</span>,<span 
);
</span>?>

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3.添加一个Image模块(名字可以随便取)

<?<span php
    </span><span class</span> ImageAction <span extends</span><span  Action{        
         
        </span><span /*</span><span *
         * 创建index 入口方法
         </span><span */</span>
        <span public</span> <span function</span><span  index(){
            </span><span $image</span>=M('Image'<span );                       
            </span><span $data</span>=<span $image</span>->order('create_time desc')->find();    <span //</span><span 获取最后上传图片</span>
            <span $this</span>->assign('data',<span $data</span><span );
            </span><span $this</span>-><span display();
        }
  
</span>?>

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4.创建相应index视图文件(index.html)

<!DOCTYPE html <span PUBLIC</span> "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
<style type="text/css">
    <span #</span><span img{height:22px; border:#000 2px solid}</span>
    <span #</span><span button{height:30px; width:100px;}</span>
</style>
</head>
<body>
    <div <span class</span>="result" >上传允许文件类型：gif png jpg 图像文件，并生成2张缩略图，其中大图带水印，生成后会删除原图。</div><br>
    <notempty name="data"><img  src="__UPLOAD__/m_{<span $data</span alt="ThinkPHP图片上传" >.image}" /> <img  src="__UPLOAD__/s_{<span $data</span alt="ThinkPHP图片上传" >.image}" /></notempty>
    <form action="__URL__/upload" method="post" enctype="multipart/form-data">
        <input type="file" name="image" id="img"/>
        <input type="submit" value="上传" id="button"> 
    </form>
</body>
</html>

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5.选择图片,点击上传按钮后,会跳到Image模块的upload方法上，Image模块上现在还没有这个方法，于是我们创建它

<?<span php
    </span><span class</span> ImageAction <span extends</span><span  Action{        
         
        </span><span /*</span><span *
         * 创建index 入口方法
         </span><span */</span>
        <span public</span> <span function</span><span  index(){
            </span><span $image</span>=M('Image'<span );                        
            </span><span $data</span>=<span $image</span>->order('create_time desc')->find();    <span //</span><span 获取最后上传图片</span>
             
            <span var_dump</span>(<span $data</span><span );
            </span><span $this</span>->assign('data',<span $data</span><span );
            </span><span $this</span>-><span display();
        } <br />               
        </span><span //</span><span 如果上传的文件不为空,跳转到_upload方法</span>
        <span public</span> <span function</span><span  upload(){        
            </span><span //</span><span 如果不为空</span>
            <span if</span>(!<span empty</span>(<span $_FILES</span><span ))
            {
                </span><span $this</span>-><span _upload();
            }
             
        }</span>

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6.如果提交的不是NULL,则跳到_upload方法上,此方法实现图片上传的功能

<?<span php
    </span><span class</span> ImageAction <span extends</span><span  Action{        
         
        </span><span /*</span><span *
         * 创建index 入口方法
         </span><span */</span>
        <span public</span> <span function</span><span  index(){
            </span><span $image</span>=M('Image'<span );                        
            </span><span $data</span>=<span $image</span>->order('create_time desc')->find();    <span //</span><span 获取最后上传图片</span>
             
            <span var_dump</span>(<span $data</span><span );
            </span><span $this</span>->assign('data',<span $data</span><span );
            </span><span $this</span>-><span display();
        } 
         
         
        </span><span //</span><span 如果上传的文件不为空,跳转到_upload方法</span>
        <span public</span> <span function</span><span  upload(){        
            </span><span //</span><span 如果不为空</span>
            <span if</span>(!<span empty</span>(<span $_FILES</span><span ))
            {
                </span><span $this</span>-><span _upload();
            }
             
        }
         
         
        </span><span /*</span><span **
         * 实现图片上传
         </span><span */</span>
        <span public</span> <span function</span><span  _upload(){
            import(</span>'@.ORG.UploadFile'<span );
            </span><span //</span><span 导入上传类</span>
            <span $upload</span> = <span new</span><span  UploadFile();
            </span><span //</span><span 设置上传文件大小</span>
            <span $upload</span>->maxSize            = 3292200<span ;
            </span><span //</span><span 设置上传文件类型</span>
            <span $upload</span>->allowExts          = <span explode</span>(',', 'jpg,gif,png,jpeg'<span );
            </span><span //</span><span 设置附件上传目录</span>
            <span $upload</span>->savePath           = './Uploads/'<span ;
            </span><span //</span><span 设置需要生成缩略图，仅对图像文件有效</span>
            <span $upload</span>->thumb              = <span true</span><span ;
            </span><span //</span><span  设置引用图片类库包路径</span>
            <span $upload</span>->imageClassPath     = '@.ORG.Image'<span ;
            </span><span //</span><span 设置需要生成缩略图的文件后缀</span>
            <span $upload</span>->thumbPrefix        = 'm_,s_';  <span //</span><span 生产2张缩略图
            //设置缩略图最大宽度</span>
            <span $upload</span>->thumbMaxWidth      = '400,100'<span ;
            </span><span //</span><span 设置缩略图最大高度</span>
            <span $upload</span>->thumbMaxHeight     = '400,100'<span ;
            </span><span //</span><span 设置上传文件规则</span>
            <span $upload</span>->saveRule           = 'uniqid'<span ;
            </span><span //</span><span 删除原图</span>
            <span $upload</span>->thumbRemoveOrigin  = <span true</span><span ;
             
             
            </span><span //</span><span 如果上传不成功</span>
            <span if</span> (!<span $upload</span>-><span upload()) 
            {
                </span><span //</span><span 捕获上传异常</span>
                <span $this</span>->error(<span $upload</span>-><span getErrorMsg());
            } 
            </span><span else</span><span  
            {
                </span><span //</span><span 取得成功上传的文件信息</span>
                <span $uploadList</span> = <span $upload</span>-><span getUploadFileInfo();
                 
                 
                </span><span //</span><span 导入图片类</span>
                import('@.ORG.Image'<span );                
             
                </span><span //</span><span 给m_缩略图添加水印, Image::water('原文件路径','水印图片地址')</span>
                Image::water(<span $uploadList</span>[0]['savepath'] . 'm_' . <span $uploadList</span>[0]['savename'], APP_PATH.'Tpl/Public/Images/logo.png'<span );
                 
                </span><span //</span><span 图片名赋值给 字段image</span>
                <span $_POST</span>['image'] = <span $uploadList</span>[0]['savename'<span ];
            }
            </span><span $model</span>  = M('image'<span );
            </span><span //</span><span 保存当前数据对象</span>
            <span $data</span>['image']          = <span $_POST</span>['image'<span ];
            </span><span $data</span>['create_time']    =<span  NOW_TIME;
            </span><span $list</span>   = <span $model</span>->add(<span $data</span><span );
            </span><span if</span> (<span $list</span> !== <span false</span><span ) 
            {
                </span><span $this</span>->success('上传图片成功！'<span );
            } 
            </span><span else</span><span  
            {
                </span><span $this</span>->error('上传图片失败!'<span );
            }
        }
         
    }
</span>?>