Code

<?php
if ($_FILES['file']['error'] === UPLOAD_ERR_OK) {
//uploading successfully done
} else {
throw new UploadException($_FILES['file']['error']);
}

//**********************************************************************************************


echo "Please wait while we attempt to upload your file...<br><br>";
 var_dump($_FILES);
//**********************************************************************************************


$target_path = APP_PATH."/uploads/";

$flag = 0; // Safety net, if this gets to 1 at any point in the process, we don't upload.

$filename = $_FILES['file']['name'];
$filesize = $_FILES['file']['size'];
$mimetype = $_FILES['file']['type'];

$filename = htmlentities($filename);
$filesize = htmlentities($filesize);
$mimetype = htmlentities($mimetype);

$target_path = $target_path . basename( $filename );

if($filename != ""){

echo "Beginning upload process for file named: ".$filename."<br>";
echo "Filesize: ".$filesize."<br>";
echo "Type: ".$mimetype."<br><br>";

}

//First generate a MD5 hash of what the new file name will be
//Force a MP3 extention on the file we are uploading

$hashedfilename = md5($filename);
$hashedfilename = $hashedfilename.".mp3";

//Check for empty file
if($filename == ""){
$error = "No File Exists!";
$flag = $flag + 1;

}

//Now we check that the file doesn't already exist.
$existname = "uploads/".$hashedfilename;

if(file_exists($existname)){

if($flag == 0){
$error = "Your file already exists on the server!
Please choose another file to upload or rename the file on your
computer and try uploading it again!";
}

$flag = $flag + 1;
}

//Whitelisted files - Only allow files with MP3 extention onto server...

$whitelist = array(".mp3");
foreach ($whitelist as $ending) {

if(substr($filename, -(strlen($ending))) != $ending) {
 $error = "The file type or extention you are trying to upload is not allowed!
You can only upload MP3 files to the server!";
$flag++;
}
}


//Now we check the filesize.  If it is too big or too small then we reject it
//MP3 files should be at least 1MB and no more than 6.5 MB

if($filesize > 6920600){
//File is too large

if($flag == 0){
$error = "The file you are trying to upload is too large!
Your file can be up to 6.5 MB in size only.
Please upload a smaller MP3 file or encode your file with a lower bitrate.";
}

$flag = $flag + 1;
}

if($filesize < 1048600){
//File is too small

if($flag == 0){
$error = "The file you are trying to upload is too small!
Your file has been marked as suspicious because our system has
determined that it is too small to be a valid MP3 file.
Valid MP3 files must be bigger than 1 MB and smaller than 6.5 MB.";
}

$flag = $flag + 1;

}

//Check the mimetype of the file
if($mimetype != "audio/x-mp3" and $mimetype != "audio/mpeg" and $mimetype != "audio/mp3"){

if($flag == 0){
$error = "The file you are trying to upload does not contain expected data.
Are you sure that the file is an MP3?";
}

$flag = $flag + 1;
}

//Check that the file really is an MP3 file by reading the first few characters of the file
#$f = @fopen($_FILES['file']['tmp_name'],'r');
#$s = @fread($f,3);
#@fclose($f);
#if($s != "ID3"){
#
#if($flag == 0){
#$error = "The file you are attempting to upload does not appear to be a valid MP3 file.";
#}

#$flag++;
#}



//All checks are done, actually move the file...

if($flag == 0){

if(move_uploaded_file($_FILES['file']['tmp_name'], $target_path)) {


    //Change the filename to MD5 hash and FORCE a MP3 extention.
 echo var_dump(@file_exists($target_path.$filename));
    if(!file_exists($target_path.$filename)){

    //Rename the file to an MD5 version

    var_dump(rename($target_path.$filename, $target_path.$hashedfilename));

    echo "The file ".  basename( $filename ). "
     has been uploaded.";

    }
    else{
      echo "There was an error uploading the file, please try again!1". PHP_EOL;
    }


} else{
    echo "There was an error uploading the file, please try again2!". PHP_EOL;
}

}
else {
echo "File Upload of $filename Failed!<br>";
if($error != ""){
echo $error;
}
}


?>