file rename while uploading - php

Question

I have a problem here im trying to upload a file
first time it is moving the filename from temp it its respective directory,
but again i try ot upload the aa different file with the same name it should rename the
first time uploaded file
with date_somefilename.csv and give the filename to its original state
for example a file test.csv ,im uploading it for first time it will upload to
corresponding directory as
test.csv,when i upload a different csv file with same name test.csv
I need to get the
test.csv (latest uploaded file)
06222012130209_test.csv(First time uploaded file)
The code is below
$place_file = "$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);
}

Answer 1

See comments in code.
$place_file = "$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 is php constant. Value is '/' or '\', depending of operation system.
pathinfo() is php function, that return information about path: dirname, basename, extension, filename.

Answer 2

What about...
$place_file = "$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;
}

Answer 3

I would not add a date to the file if it already exists. Instead I would just add a number to the end of it. Keep it simple.
$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);

Answer 4

$target = "uploads/$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);
Beware though: Security threats with uploads.

Answer 5

how about something like this?
<?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);