0

我在尝试上传文件时遇到问题

第一次将文件名从 temp 移动到其各自的目录时，

但我再次尝试上传具有相同名称的不同文件，它应该重命名第一次上传的文件

使用 date_somefilename.csv 并将文件名赋予其原始状态

例如文件 test.csv ，我第一次上传它会上传到相应的目录

test.csv，当我上传一个同名的不同 csv 文件 test.csv

我需要得到

test.csv（最新上传的文件）

06222012130209_test.csv(首次上传文件)

代码如下

$place_file = "$path/$upload_to/$file_name";     



if (!file_exists('uploads/'.$upload_to.'/'.$file_name)) 
 {

move_uploaded_file($tmp, $place_file);  


}else{

 move_uploaded_file($tmp, $place_file); 
 $arr1 = explode('.csv',$file_name);
  $todays_date =  date("mdYHis");
   $new_filename = $todays_date.'_'.$arr1[0].'.csv';
  echo  $str_cmd = "mv " . 'uploads/'.$upload_to.'/'.$file_name . " uploads/$upload_to/$new_filename";
   system($str_cmd, $retval); 
}
4

5 回答 5

2

请参阅代码中的注释。

$place_file = "$path/$upload_to/$file_name";     

if (!file_exists($place_file)) {
    move_uploaded_file($tmp, $place_file);  
} else {
    // first rename
    $pathinfo = pathinfo($place_file);
    $todays_date = date("mdYHis");
    $new_filename = $pathinfo['dirname'].DIRECTORY_SEPARATOR.$todays_date.'_'.$pathinfo['basename'];
    rename($place_file, $new_filename)
    // and then move, not vice versa
    move_uploaded_file($tmp, $place_file); 
}

DIRECTORY_SEPARATOR是 php 常量。值是 '/' 或 '\'，取决于操作系统。

pathinfo()是 php 函数，它返回有关路径的信息：目录名、基本名、扩展名、文件名。

于 2012-06-22T11:18:50.557 回答
1

关于什么...

$place_file = "$path/$upload_to/$file_name";     

if (file_exists($place_file)) {
   $place_file = date("mdYHis")."_".$file_name;
}

if (!move_uploaded_file($tmp, $place_file)) {
   echo "Could not move file";
   exit;
}
于 2012-06-22T11:16:36.150 回答
1

如果文件已经存在，我不会在文件中添加日期。相反，我只会在它的末尾添加一个数字。把事情简单化。

$counter = 0;
do {
    // destination path path
    $destination = $path.'/'.$upload_to.'/';

    // get extension
    $file_ext = end(explode('.', $file_name));

    // add file_name without extension
    if (strlen($file_ext))
        $destination .= substr($file_name, 0, strlen($file_name)-strlen($file_ext)-1);

    // add counter
    if ($counter)
        $destination .= '_'.$counter;       

    // add extension
    if (strlen($file_ext))
        $destination .= $file_ext;

    $counter++;
while (file_exists($destination));

// move file
move_uploaded_file($tmp, $destination);
于 2012-06-22T11:35:10.987 回答
0 
$target = "uploads/$upload_to/$file_name";
if (file_exists($target)) {
    $pathinfo = pathinfo($target);
    $newName = "$pathinfo[dirname]/" . date('mdYHis') . "_$pathinfo[filename].$pathinfo[extension]";
    rename($target, $newName);
}
move_uploaded_file($tmp, $target);

但请注意：上传的安全威胁。

于 2012-06-22T11:19:38.273 回答
0

这样的事情怎么样？

<?php

$tmp = '/tmp/foo'; // whatever you got out of $_FILES
$desitnation = '/tmp/bar.xyz'; // wherever you want that file to be saved

if (file_exists($desitnation)) {
  $file = basename($destination)
  $dot = strrpos($file, '.');

  // rename existing file to contain its creation time
  // "/temp/bar.xyz" -> "/temp/bar.2012-12-12-12-12-12.xyz"
  $_destination = dirname($destination) . '/'
      . substr($file, 0, $dot + 1)
      . date('Y-m-d-H-i-s', filectime($destination))
      . substr($file, $dot);

  rename($destination, $_destination);
}

move_uploaded_file($tmp, $destination);
于 2012-06-22T11:20:05.497 回答