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PHP中实现多张图片上传并校验

WBOY
Release: 2016-06-21 08:57:07
Original
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单张的图片上传是不复杂的,这里涉及到多张图片上传和对图片格式的校验,保证上传的一定是图片,防止上传其他文件到服务器。

  基本实现算法是使用数组的形式,把所有的图片提交个一个数组,对数组的元素进行一个个的处理。

/*********************************************
* 文件:uploadimg.php
* 用途:图片上传程序
* 版本:v1.0
* 创建:2005-03-28 11:07
* 修改:2005-04-06 08:43
* 版权:heiyeluren
*********************************************/

// 图片目录
$img_dir = "../upload/";
// …… html 显示上传界面

/* 图片上传处理 */
// 把图片传到服务器
// 初始化变量

$uploaded = 0;
$unuploaded = 0;

//只允许五张图片上传

for ($i=0; $i {
       //获取当前图片的信息
$is_file = $_FILES['imgfile']['name'][$i];
//如果当前图片不为空
       if (!empty($is_file))
       {
              //把当前图片的信息存储到变量里
              $result[$i] = "
                           


                            ". $_FILES['imgfile']['name'][$i] ."
                            ". round($_FILES['imgfile']['size'][$i]/1024, 2) ."K
                            ". $_FILES['imgfile']['type'][$i] ."
                            ";

              // 判断上传的图片的类型是不是jpg,gif,png,bmp中的一种,同时判断是否上传成功
              if (

                     $_FILES['imgfile']['type'][$i] == "image/pjpeg"  
                     $_FILES['imgfile']['type'][$i] == "image/gif"    
                     $_FILES['imgfile']['type'][$i] == "image/x-png"  
                     $_FILES['imgfile']['type'][$i] == "image/bmp"
                 )
              {
                     //如果上传的文件没有在服务器上存在
                     if (!file_exists($img_dir . $_FILES['imgfile']['name'][$i]))
                     {
                            //把图片文件从临时文件夹中转移到我们指定上传的目录中
                            move_uploaded_file($_FILES['imgfile']['tmp_name'][$i],
       $img_dir . $_FILES['imgfile']['name'][$i]);
                            $result[$i] .= "成功";
                            $uploaded++;
                     }
                     else         //如果文件已经在服务器上存在
                     {
                            $result[$i] .= "文件已存在";
                            $unuploaded++;
                            continue;
                     }
              }
              else
              {
                     $result[$i] .= "失败";
                     $unuploaded++;
              }
              $result[$i] .= "

";
       } //end if
} // end for


// 如果没有选择任何图片
if (empty($result))
{
       prompt_msg("错误信息", "没有选择任何图片。", "返回上一步", "uploadimg.php?action=upload" );
       exit();
}

// 显示所有上传后的结果
echo "


      
         
         
         
         
      
       ";

foreach( $result as $value)
{
       echo $value;
}

echo "


    
     
     
      
    
  
共上传 " . ($uploaded + $unuploaded) . ", 成功: $uploaded, 失败: $unuploaded

       ";



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