Heim > Artikel > Backend-Entwicklung > ThinkPHP图片上传_PHP教程

ThinkPHP图片上传_PHP教程

WBOYOriginal: 2016-07-13 10:36:401125Durchsuche

　　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;

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>?>

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>?>

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_PHP教程" >.image}" /> <img  src="__UPLOAD__/s_{<span $data</span alt="ThinkPHP图片上传_PHP教程" >.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>

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>

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>?>

最后图片上传成功,生成两张缩略图：

需要说明的是：

ThinkPHP里自带的图片上传类(UploadFile.class.php) 和图片模型类(Image.class.php),要完整版的ThinkPHP包才有。

没有的话需要在Lib里创建一个文件夹(ORG),然后去官网下载扩展包把这两个文件放到ORG文件夹中。

我的是第二种情况

Stellungnahme：

Der Inhalt dieses Artikels wird freiwillig von Internetnutzern beigesteuert und das Urheberrecht liegt beim ursprünglichen Autor. Diese Website übernimmt keine entsprechende rechtliche Verantwortung. Wenn Sie Inhalte finden, bei denen der Verdacht eines Plagiats oder einer Rechtsverletzung besteht, wenden Sie sich bitte an admin@php.cn

Vorheriger Artikel：PHP curl 模拟登录_PHP教程Nächster Artikel：str_replace使用_PHP教程

In Verbindung stehende Artikel

Mehr sehen