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Check if File Exists / Append Number to Name

If the file name exists, returns new file name with _number appended so you don't overwrite it.

function file_newname($path, $filename){
    if ($pos = strrpos($filename, '.')) {
           $name = substr($filename, 0, $pos);
           $ext = substr($filename, $pos);
    } else {
           $name = $filename;
    }

    $newpath = $path.'/'.$filename;
    $newname = $filename;
    $counter = 0;
    while (file_exists($newpath)) {
           $newname = $name .'_'. $counter . $ext;
           $newpath = $path.'/'.$newname;
           $counter++;
     }

    return $newname;
}

Example returns:

myfile.jpg
myfile_0.jpg
myfile_1.jpg

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Anton says:

01/27/2010 at 4:36 pm

Strange this one doesn’t work on my site.

My goal is to restrict users to upload only 10 pics each (from 1 to 10) … picture_1-10.jpg.
If a user decided to delete a picture, for example picture_7.jpg and upload a new one the picture should be renamed with the same title as the deleted one.

Any suggestions? Thanks in advance.

Here is my PHP script:

function Upload_GenFilename($filename, $tag, $filecounter = NULL)
  {
    $filedate = bqSearch;
    //Neuen Startwert f?r Zufallszahl bestimmen
    mt_srand();
    $randomnumber = mt_rand(1, 10);

    //Suffix = $tag mit dem . entfernen
    //nur wenn in filename enthalten
    if(stristr($filename,$tag))
    {
      $filename = substr($filename,0,strlen($filename)-strlen($tag)-1);
    }

    //Neuer Filename
    if($filecounter == NULL)
    {
      $newfilename = $filename.'_'.$filedate.'.'.$tag;
    }

    else
    {
      $newfilename = $filename.'_'.$filecounter.'_'.$filedate.'_'.$tag;
    }
    return $newfilename;

A little dab'll do ya

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Check if File Exists / Append Number to Name

Example returns:

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