php文件下传、上载
- WBOYオリジナル
- 2016-06-13 10:39:43814ブラウズ
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。
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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>?
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;?>?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。
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