ThinkPHP图片上传_PHP教程-php教程-PHP中文网

首页

后端开发

php教程

ThinkPHP图片上传_PHP教程

WBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWB

Jul 13, 2016 am 10:36 AM

aspnet软件编程

　　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="/static/imghwm/default1.png"  data-src="http://www.bkjia.com/uploads/allimg/140310/052001C59-0.jpg"  class="lazy" / alt="ThinkPHP图片上传_PHP教程" > <img  src="/static/imghwm/default1.png"  data-src="http://www.bkjia.com/uploads/allimg/140310/052001C59-0.jpg"  class="lazy" / alt="ThinkPHP图片上传_PHP教程" ></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

声明

本文内容由网友自发贡献，版权归原作者所有，本站不承担相应法律责任。如您发现有涉嫌抄袭侵权的内容，请联系admin@php.cn

简单地说明PHP会话的概念。Apr 26, 2025 am 12:09 AM

phpsessionstrackuserdataacrossmultiplepagerequestsusingauniqueIdStoredInacookie.here'showtomanageThemeffectionaly：1）startAsessionWithSessionwwithSession_start（）和stordoredAtain $ _session.2）

您如何循环中存储在PHP会话中的所有值？Apr 26, 2025 am 12:06 AM

在PHP中，遍历会话数据可以通过以下步骤实现：1.使用session_start()启动会话。2.通过foreach循环遍历$_SESSION数组中的所有键值对。3.处理复杂数据结构时，使用is_array()或is_object()函数，并用print_r()输出详细信息。4.优化遍历时，可采用分页处理，避免一次性处理大量数据。这将帮助你在实际项目中更有效地管理和使用PHP会话数据。

说明如何使用会话进行用户身份验证。Apr 26, 2025 am 12:04 AM

会话通过服务器端的状态管理机制实现用户认证。1)会话创建并生成唯一ID，2)ID通过cookies传递，3)服务器存储并通过ID访问会话数据，4)实现用户认证和状态管理，提升应用安全性和用户体验。

举一个如何在PHP会话中存储用户名的示例。Apr 26, 2025 am 12:03 AM

Tostoreauser'snameinaPHPsession,startthesessionwithsession_start(),thenassignthenameto$_SESSION['username'].1)Usesession_start()toinitializethesession.2)Assigntheuser'snameto$_SESSION['username'].Thisallowsyoutoaccessthenameacrossmultiplepages,enhanc

哪些常见问题会导致PHP会话失败？Apr 25, 2025 am 12:16 AM

PHPSession失效的原因包括配置错误、Cookie问题和Session过期。1.配置错误：检查并设置正确的session.save_path。2.Cookie问题：确保Cookie设置正确。3.Session过期：调整session.gc_maxlifetime值以延长会话时间。

您如何在PHP中调试与会话相关的问题？Apr 25, 2025 am 12:12 AM

在PHP中调试会话问题的方法包括：1.检查会话是否正确启动；2.验证会话ID的传递；3.检查会话数据的存储和读取；4.查看服务器配置。通过输出会话ID和数据、查看会话文件内容等方法，可以有效诊断和解决会话相关的问题。

如果session_start（）被多次调用会发生什么？Apr 25, 2025 am 12:06 AM

多次调用session_start()会导致警告信息和可能的数据覆盖。1)PHP会发出警告，提示session已启动。2)可能导致session数据意外覆盖。3)使用session_status()检查session状态，避免重复调用。

您如何在PHP中配置会话寿命？Apr 25, 2025 am 12:05 AM

在PHP中配置会话生命周期可以通过设置session.gc_maxlifetime和session.cookie_lifetime来实现。1)session.gc_maxlifetime控制服务器端会话数据的存活时间，2)session.cookie_lifetime控制客户端cookie的生命周期，设置为0时cookie在浏览器关闭时过期。

See all articles