php文件下传、上载-PHP-Tutorial-php.cn

php文件下传、上载

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Freigeben： 2016-06-13 10:39:43

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php文件上传、下载

以前一直在做java，最近转行去搞php开发，总觉得力不从心。这几天有个需求，是关于php的文件上传和下载的。给大家分享下自己的学习资料。

1.先来个请求页面upload.html

<html><head>  <title>Administration - upload new files</title></head><body><h1>Upload new news files</h1><form enctype="multipart/form-data" action="upload.php" method=post>  <input type="hidden" name="MAX_FILE_SIZE" value="1000000">  Upload this file: <input name="userfile" type="file">  <input type="submit" value="Send File"></form></body></html>

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2.php处理客户端请求的数据upload.html

<html><head>  <title>Uploading...</title></head><body><h1>Uploading file...</h1><?php//Check to see if an error code was generated on the upload attempt  if ($_FILES['userfile']['error'] > 0)  {    echo 'Problem: ';    switch ($_FILES['userfile']['error'])    {      case 1:	echo 'File exceeded upload_max_filesize';	  			break;      case 2:	echo 'File exceeded max_file_size';	  			break;      case 3:	echo 'File only partially uploaded';	  			break;      case 4:	echo 'No file uploaded';	  			break;	  case 6:   echo 'Cannot upload file: No temp directory specified.';	  			break;	  case 7:   echo 'Upload failed: Cannot write to disk.';	  			break;    }    exit;  }  // Does the file have the right MIME type?  if ($_FILES['userfile']['type'] != 'text/plain')  {    echo 'Problem: file is not plain text';    exit;  }  // put the file where we'd like it  $upfile = '/uploads/'.$_FILES['userfile']['name'];  if (is_uploaded_file($_FILES['userfile']['tmp_name']))   {     if (!move_uploaded_file($_FILES['userfile']['tmp_name'], $upfile))     {        echo 'Problem: Could not move file to destination directory';        exit;     }  }   else   {    echo 'Problem: Possible file upload attack. Filename: ';    echo $_FILES['userfile']['name'];    exit;  }  echo 'File uploaded successfully<br><br>';   // reformat the file contents  $fp = fopen($upfile, 'r');  $contents = fread ($fp, filesize ($upfile));  fclose ($fp);   $contents = strip_tags($contents);  $fp = fopen($upfile, 'w');  fwrite($fp, $contents);  fclose($fp);  // show what was uploaded  echo 'Preview of uploaded file contents:<br><hr>';  echo $contents;  echo '<br><hr>';?></body></html>

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3.php文件下载

<?php	$filePath = "template/";//此处给出你下载的文件在服务器的什么地方	$fileName = "template.xls";	//此处给出你下载的文件名	$file = fopen($filePath . $fileName, "r"); //   打开文件	//输入文件标签	Header("Content-type:application/octet-stream ");	Header("Accept-Ranges:bytes ");	Header("Accept-Length:   " . filesize($filePath . $fileName));	Header("Content-Disposition:   attachment;   filename= " . $fileName);		//   输出文件内容	echo fread($file, filesize($filePath . $fileName));	fclose($file);	exit;?>

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?总的来说，上面的3个代码段只是简单介绍了php文件的上传下载，还有很多问题要解决，就例如上传大文件的时候怎么处理，批量上传、大文件下载等等问题。当然跟java一样，php也有很多框架可以解决这方面。