上传时重命名文件

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.