Uploaded images don't save in destination folder

I am new here, nice to meet you.

I'm trying create a clean copy of a picture uploaded by a user after security checks, and to save this copy in a designated folder and in my DB. I'm working with XAMPP on Windows 10 and I granted the right permissions for the said folder. My code is below:

/*bit of code for picture addition, in a function for album publication*/
if($_FILES['albumCover']['error'] === 0) {
    $covType;
    $createCover;
    $covName = guidv4();

    $imgRegex = '/^[a-z\d][^.]*\.(jpe?g$)|\.(png$)/i';

    $covInfo = finfo_open(FILEINFO_MIME_TYPE);
    $covMime = finfo_file($covInfo, $_FILES['albumCover']['tmp_name']);
    finfo_close($covInfo);

    if(!preg_match($imgRegex, $_FILES['albumCover']['name']) ||
       str_contains($_FILES['albumCover']['name'], ' ') ||
       in_array($_FILES['albumCover']['type'], ['image/jpeg','image/png'])||
       strpos($covMime, 'image/') !== 0) 
    {

        $addMessages['errors'][] = 'Caractère autorisé pour le nom d\'image : lettres sans 
              accent / sans trémas / sans cédille, chiffres, tirets et underscores. Fichiers
              autorisés : images .jpg, .jpeg ou .png.';
    }

    if(empty($addMessages['errors'])) {

        if(preg_match($imgRegex, $_FILES['albumCover']['name'])
             && $_FILES['albumCover']['type'] == 'image/jpeg'
             && strpos($covMime, 'image/') !== 0) 
        {

            $covType = 'jpeg';
            $createCover = imagecreatefromjpeg($_FILES['albumCover']['tmp_name']);

            imagejpeg($createCover,
                self::COV_SECURE_PATH.$covName.'.'.pathinfo($_FILES['albumCover']['name'], 
                      PATHINFO_EXTENSION)
            );

            move_uploaded_file($_FILES['albumCover']['tmp_name'],
            self::COV_SECURE_PATH.'/'.$_FILES['albumCover']['name']);
        } elseif(preg_match($imgRegex, $_FILES['albumCover']['name'])
                && $_FILES['albumCover']['type'] == 'image/png'
                && strpos($covMime, 'image/') !== 0) 
        {

            $covType = 'png';
            $createCover = imagecreatefrompng($_FILES['albumCover']['tmp_name']);

            imagepng($createCover,
                    self::COV_SECURE_PATH.$covName.'.'.pathinfo($_FILES['albumCover']['name'],
                   PATHINFO_EXTENSION));

            move_uploaded_file($_FILES['albumCover']['tmp_name'],
            self::COV_SECURE_PATH.'/'.$_FILES['albumCover']['name']);
        }
    }
}

A few more details: the bit of code above is part of a class method. The constant COV_SECURE_PATH is declared in the class, before the method. And the guidv4() function for the picture name is in the same file, before the declaration of the class.

I have no PHP error messages, my prints display the right name and extension of each file and I declared the attribute enctype="multipart/form-data" in my HTML form. The pictures are saved in my DB (I will add the code regarding the DB if needed), but they won't be saved in my folder and I don't know what I'm missing. So far I haven't found an answer when searching in any site, any help will be very appreciated.

Well, I have finally fixed everything. My error was: if(preg_match($imgRegex, $_FILES['albumCover']['name']) && $_FILES['albumCover']['type'] == 'image/jpeg' && strpos($covMime, 'image/') !== 0) {

instead of if(preg_match($imgRegex, $_FILES['albumCover']['name']) && $_FILES['albumCover']['type'] == 'image/jpeg' && strpos($covMime, 'image/') === 0) {

And I also realised that I hadn't activated GD in my php.ini, now it's done. Thanks to everyone who answered me!