uniquenameinphp.php

<?php
    //****** Function for generate random character *****************************/
    function randomGenerator($strlength)
    {
        $str="ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789";
        $strshuf=str_shuffle($str);
        $start=rand(0,strlen($str) - $strlength);
        return substr(str_shuffle($strshuf),$start,$strlength);
    }

    $path_thumbs         =    "x:/projectname/uploads/";  //Upload Path
    $uploadfilename     =    "Attachfile";  //File name submitted by form

    $code                   =   randomGenerator(5); //Generate random character
    $fileParts          =   pathinfo($_FILES[$uploadfilename]['name']);
    $file_name_only     =   stripslashes($fileParts['filename']);
    $extension          =   $fileParts['extension'];
    $UploadFileName     =     $file_name_only."_".$code.".$extension";  //Make a new file name
   
    move_uploaded_file($_FILES[$formname]["tmp_name"],$path_thumbs.$UploadFileName); //upload file
      
?>