7天入门php-文件上传进度

获取文件上传进度的方法很多，该文介绍的是使用session.upload_progress，基于PHP 5.4以上版本的方法。

【1】文件php.ini 配置

根据实际情况进行设置

session.upload_progress.enabled[=1] : 是否启用上传进度报告(默认开启)
session.upload_progress.cleanup[=1] : 是否在上传完成后及时删除进度数据(默认开启, 推荐开启).
session.upload_progress.prefix[=upload_progress_] : 进度数据将存储在_SESSION[session.upload_progress.prefix . _POST[session.upload_progress.name]]
session.upload_progress.name[=PHP_SESSION_UPLOAD_PROGRESS] : 如果_POST[session.upload_progress.name]没有被设置, 则不会报告进度.
session.upload_progress.freq[=1%] : 更新进度的频率(已经处理的字节数), 也支持百分比表示’%’.
session.upload_progress.min_freq[=1.0] : 更新进度的时间间隔(秒级)

;允许客户端单个POST请求发送的最大数据 M
post_max_size=2048M

;接受所有数据到开始执行脚本的最大时间 S
max_input_time=60

;脚本的最大执行时间 S
max_execution_time=0

;是否开启文件上传功能
file_uploads = On

;文件上传的临时目录
upload_tmp_dir="C:\xampp\tmp"

;允许单个请求上传的最大文件大小 M
upload_max_filesize = 2048M

;允许单个POST请求同时上传的最大文件数量
max_file_uploads = 20

【2】 _FILES变量简介

 $_FILES["file"]["name"] - 被上传文件的名称
 $_FILES["file"]["type"] - 被上传文件的类型
 $_FILES["file"]["size"] - 被上传文件的大小，以字节计
 $_FILES["file"]["tmp_name"] - 存储在服务器的文件的临时副本的名称
 $_FILES["file"]["error"] - 由文件上传导致的错误代码

【3】代码

文件上传表单

      设置session.upload_progress.name key的值

 if (version_compare(phpversion(), '5.4.0', '<'))
     exit('ERROR: Your PHP version is ' . phpversion() . ' but this script requires PHP 5.4.0 or higher.');

 if (!intval(ini_get('session.upload_progress.enabled')))
     exit('session.upload_progress.enabled is not enabled, please activate it in your PHP config file to use this script.');

 require_once ("upload.class.php");
 ?>




 "utf-8">


 "upload-form" action="upload.php" method="POST" enctype="multipart/form-data">

  "hidden"
   name="session.upload_progress.name"); ?>" value="" />
                       
     
    "file1[]" type="file" align="right"/> 
    "submit" name="Submit" value="上传"/>

文件上传处理类

 class CUpload
 {
     const   UPLOAD_PROGRESS_PREFIX = 'progress_bar';
     private $_sMsg,  $_sUploadDir,  $_sProgressKey;

     // The short array syntax (only for PHP 5.4.0 and higher)
     private $_aErrFile = [
          UPLOAD_ERR_OK         => 'There is no error, the file uploaded with success.',
          UPLOAD_ERR_INI_SIZE   => 'The uploaded file exceeds the upload_max_filesize directive in php.ini.',
          UPLOAD_ERR_FORM_SIZE  => 'The uploaded file exceeds the MAX_FILE_SIZE directive that was specified in the HTML form.',
          UPLOAD_ERR_PARTIAL    => 'The uploaded file was only partially uploaded.',
          UPLOAD_ERR_NO_FILE    => 'No file was uploaded.',
          UPLOAD_ERR_NO_TMP_DIR => 'Missing a temporary folder.',
          UPLOAD_ERR_CANT_WRITE => 'Failed to write file to disk.',
          UPLOAD_ERR_EXTENSION  => 'A PHP extension stopped the file upload.'
     ];

     public function __construct()
     {
         // Session initialization
         if ('' === session_id()) session_start();

         $this->_sUploadDir = 'uploads/';
         $this->_sProgressKey = strtolower(ini_get('session.upload_progress.prefix') . static::UPLOAD_PROGRESS_PREFIX);
     }

     public function __destruct()
     {
         if ('' !== session_id())
         {
             $_SESSION = array();
             session_destroy();
         }
     }

     /**
      * @return object this
      */
     public function addFile()
     {
         if(!empty($_FILES))
         {
             $this->_sMsg = '';

             foreach($_FILES as $sKey => $aFiles)
             {
                 for($i = 0, $iNumFiles = count($aFiles['tmp_name']); $i < $iNumFiles; $i++)
                 {
                     /**
                      * 获取上传文件的参数
                      */
                     $iErrCode   = $aFiles['error'][$i];
                     $iSize      = $aFiles['size'][$i];
                     $sFileName  = $aFiles['name'][$i];
                     $sTmpFile   = $aFiles['tmp_name'][$i];
                     $sFileDest  = $this->_sUploadDir . $sFileName;
                     $sTypeFile  = $aFiles['type'][$i];

                     /**
                      * 检测文件类型
                      */
                     //$bIsImgExt = (strtolower(substr(strrchr($sFileName, '.'), 1))); // Get the file extension
                     //if(($bIsImgExt == 'jpeg' || $bIsImgExt == 'jpg' || $bIsImgExt == 'png' || $bIsImgExt == 'gif') && (strstr($sTypeFile, '/', true) === 'image'))
                     {
                         if($iErrCode == UPLOAD_ERR_OK)
                         {
                             move_uploaded_file($sTmpFile, $sFileDest);

                             $this->_sMsg .= 'Successful "' . $sFileName . '" file upload!';
                             $this->_sMsg .= 'Image type: ' . str_replace('image/', '', $sTypeFile) . '';
                             $this->_sMsg .= 'Size: ' . round($iSize / 1024) . ' KB';
                             $this->_sMsg .= ' . $sFileDest . '" title="Click here to see the original file" target="_blank"> . $sFileDest . '" alt="' . $sFileName  . '" width="300" height="250" style="border:1.5px solid #ccc; border-radius:5px" />';
                         }
                         else
                         {
                             $this->_sMsg .= 'Error while downloading the file "' . $sFileName . '"';
                             $this->_sMsg .= 'Error code: "' . $iErrCode . '"';
                             $this->_sMsg .= 'Error message: "' . $this->_aErrFile[$iErrCode] . '"';
                         }
                     }
                     //else
                     {
                     //    $this->_sMsg .= 'File type incompatible. Please save the image in .jpg, .jpeg, .png or .gif';
                     }
                 }
             }
         }
         else
         {
             $this->_sMsg = 'You must select at least one file before submitting the form.';
         }

         return $this;
     }

     /**
      * 中断文件上传
      *
      * @return object this
      */
     public function cancel()
     {
         if (!empty($_SESSION[$this->_sProgressKey]))
             $_SESSION[$this->_sProgressKey]['cancel_upload'] = true;

         return $this;
     }

      /**
      * @return 上传进度
      */
     public function progress()
     {
         if(!empty($_SESSION[$this->_sProgressKey]))
         {
             $aData = $_SESSION[$this->_sProgressKey];
             $iProcessed = $aData['bytes_processed'];
             $iLength    = $aData['content_length'];
             $iProgress  = ceil(100*$iProcessed / $iLength);
         }
         else
         {
             $iProgress = 100;
         }

         return $iProgress;
     }

      /**
      * @return object this
      */
      public function show()
      {
          ob_start();
          echo '$_FILES Result:';
          var_dump($_FILES);
          echo '';
          echo '$_SESSION Result:';
          var_dump($_SESSION);
          echo '';
          $this->_sMsg = ob_get_clean();

          return $this;
      }

     /**
      * Get the JSON informational message.
      *
      * @param integer $iStatus, 1 = success, 0 = error
      * @param string $sTxt
      * @return string JSON Format.
      */
      public static function jsonMsg($iStatus, $sTxt)
      {
          return '{"status":' . $iStatus . ',"txt":"' . $sTxt . '"}';
      }

     /**
      * Get the informational message.
      *
      * @return string
      */
     public function __toString()
     {
         return $this->_sMsg;
     }
 }

执行文件上传操作

 require_once ("upload.class.php");
 $upload = new CUpload;
 $upload->addFile();

 echo $upload;
 /*$_SESSION["upload_progress_testUpload"] = array(
  "start_time" => 1234567890,   // 请求时间
  "content_length" => 57343257, // 上传文件总大小
  "bytes_processed" => 453489,  // 已经处理的大小
  "done" => false,              // 当所有上传处理完成后为TRUE
  "files" => array(
   0 => array(
    "field_name" => "file1",       // 表单中上传框的名字
    // The following 3 elements equals those in $_FILES
    "name" => "foo.avi",
    "tmp_name" => "/tmp/phpxxxxxx",
    "error" => 0,
    "done" => true,                // 当这个文件处理完成后会变成TRUE
    "start_time" => 1234567890,    // 这个文件开始处理时间
    "bytes_processed" => 57343250, // 这个文件已经处理的大小
   ),
   // An other file, not finished uploading, in the same request
   1 => array(
    "field_name" => "file2",
    "name" => "bar.avi",
    "tmp_name" => NULL,
    "error" => 0,
    "done" => false,
    "start_time" => 1234567899,
    "bytes_processed" => 54554,
   ),
  )
 );*/
 ?>

获取文件上传进度

 session_start();

 require_once ("upload.class.php");
 echo (new CUpload())->progress();
 ?>

UI使用一些插件上传文件，就可以获取上传进度，不用这么麻烦