Stripping Filename in PHP - php

Question

I'm building a version control system in PHP. I almost have a fully working system and am currently adding features. My code below renames a file as "filename_Ver 0.01" and increments by .01 if the user selects a minor revision from the html selectbox. If it's a major revision, the file gets renamed as filename_Ver 1 and increments by 1 for each major version. If I combine both, let's say a major and a minor revision I end up with a file named "filename_Ver 1.01.ext"
Displaying the filename in a PHP table is easy enough but I'd like to optionally just display the version number say in a seperate table field called "Version". How would I strip that from the filename so I can add that to the database? I know I'd have to do something within the while loop to get what I want out. $file = $dr.$fName.'_'.'Ver '.$i.$ext; I want it to display something like the following:
FileName | Version
test_Ver 0.1 | 0.1
test_Ver 0.2 | 0.2
test_Ver 1 | 1
test_Ver 1.1 | 1.1
function update_file_name_major($file)
{
$pos = strrpos($file,'.');
$ext = substr($file,$pos);
$dir = strrpos($file,'/');
$dr = substr($file,0,($dir+1));
$arr = explode('/',$file);
$fName = substr($arr[(count($arr) - 1)], 0, -strlen($ext));
$exist = FALSE;
$i = 1;
while(!$exist)
{
$file = $dr.$fName.'_'.'Ver '.$i.$ext;
if(!file_exists($file))
$exist = TRUE;
$i++;
}
return $file;
}
function get_file_name_major_latest($file)
{
$pos = strrpos($file,'.');
$ext = substr($file,$pos);
$dir = strrpos($file,'/');
$dr = substr($file,0,($dir+1));
$arr = explode('/',$file);
$fName = substr($arr[(count($arr) - 1)], 0, -strlen($ext));
$exist = FALSE;
$i = 1;
while(!$exist)
{
$file = $dr.$fName.'_'.'Ver '.$i.$ext;
if(!file_exists($file)){
$exist = TRUE;
return $i;
}
$i++;
}
return 0;
}
function update_file_name_minor($file, $latest_major = 0)
{
$pos = strrpos($file,'.');
$ext = substr($file,$pos);
$dir = strrpos($file,'/');
$dr = str_replace(end(explode("/",$file)), '', $file);
$arr = explode('/',$file);
$fName = current(explode(".",end(explode("/",$file))));
$exist = FALSE;
$i = (float) $latest_major. '.01';
while(!$exist)
{
$file = $dr.$fName.'_'.'Ver '.$i.$ext;
if(!file_exists($file))
$exist = TRUE;
$i += 0.01;
}
return $file;
}
if ( isset( $_POST['addfile'] ) ) {
// variables
define('UPLOAD_DIR', 'repository/');
$fileName = $_FILES['file'];
$file_type = $_FILES['file']['type'];
$projectname=$_POST['projectname'];
$comments=$_POST['comments'];
if($_POST['rev_type'] == 'Minor') {
// check for which action should be taken if file already exist
if(file_exists(UPLOAD_DIR . $fileName['name']))
{
$latest_major = 0;
if(update_file_name_major(UPLOAD_DIR.$fileName['name']) != UPLOAD_DIR.$fileName['name']){
$latest_major = get_file_name_major_latest(UPLOAD_DIR.$fileName['name']);
--$latest_major;
}
$updatedFileName = update_file_name_minor(UPLOAD_DIR.$fileName['name'], $latest_major);
move_uploaded_file($fileName['tmp_name'], $updatedFileName);
include 'db.php';
$updatedFileName2 = update_file_name_minor($fileName['name'], $latest_major);
$add = mysql_query("INSERT INTO `myversions`(filename, filetype, projectname, comments, created)
VALUES ('$updatedFileName2', '$file_type','$projectname','$comments', NOW())");
echo "You have successfully uploaded and renamed the file as a minor revision.";
}
else
{
move_uploaded_file($fileName['tmp_name'], UPLOAD_DIR.$fileName['name']);
echo "You have successfully uploaded the file.";
}
}
elseif($_POST['rev_type'] == 'Major') {
// check for which action should be taken if file already exist
if(file_exists(UPLOAD_DIR . $fileName['name']))
{
$updatedFileName = update_file_name_major(UPLOAD_DIR.$fileName['name']);
move_uploaded_file($fileName['tmp_name'], $updatedFileName);
include 'db.php';
$updatedFileName2 = update_file_name_major($fileName['name']);
$add = mysql_query("INSERT INTO `myversions`(filename, filetype, projectname, comments, created)
VALUES ('$updatedFileName2', '$file_type','$projectname','$comments', NOW())");
echo "You have successfully uploaded and renamed the file as a major revision.";
}
else
{
move_uploaded_file($fileName['tmp_name'], UPLOAD_DIR.$fileName['name']);
echo "You have successfully uploaded the file.";
}
}
} //main if