上传时文件重命名 - file rename while uploading

我在尝试上传文件时遇到问题

第一次将文件名从临时移动到其各自的目录中时，

但是我再次尝试上传具有相同名称的AA不同文件，它应该重命名首次上传的文件

date_somefilename.csv并将文件名指定为其原始状态

例如文件测试.csv ，我第一次上传它会上传到对应的目录为

test.csv，当我上传具有相同名称测试的不同CSV文件时.csv

我需要得到

测试.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); 
}

查看代码中的注释。

$place_file = "$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。值为"/"或"''"，具体取决于操作系统。

pathinfo（）是 PHP 函数，它返回有关 path 的信息：目录名、基名、扩展名、文件名。

怎么样...

$place_file = "$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;
}

如果文件已经存在，我不会向文件添加日期。相反，我只会在它的末尾添加一个数字。保持简单。

$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);

$target = "uploads/$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。

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);