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php文件下传、上载

程序员文章站 2022-05-19 18:22:16
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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。

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1.先来个请求页面upload.html

Administration - upload new files

Upload new news files

Upload this file:

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2.php处理客户端请求的数据upload.html

Uploading...

Uploading file...

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

'; // 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:

'; echo $contents; echo '

';?>

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3.php文件下载

?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。

php文件下传、上载

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