upload obrázku a vytvoření miniatury

<?php

$slozka= $_GET['galerie'];
$uploadDir = "../photos/$slozka"; // adresar, kam se maji nahrat obrazky (bez lomitka na konci)
$allowedExt = array('jpg', 'jpeg', 'png', 'gif'); // pole s povolenymi priponami
$galerie = $_GET['galerie'];  
// zpracovani uploadu
if(isset($_FILES['nazev']) && is_array($_FILES['nazev']['name'])) {
 
    $counter = 0;
    $allowedExt = array_flip($allowedExt);
    foreach($_FILES['nazev']['name'] as $klic => $nazev) {
      
        $dot="INSERT INTO {$cfg['tbl_fotky']}
                (nazev, galerie, title) VALUES
                ('$nazev','$galerie','{$_POST['title']}')";
             queryDBdata ($dot);
      
        $fileName = basename($nazev);
        $tmpName = $_FILES['nazev']['tmp_name'][$klic];
        // kontrola souboru
        if(
            !is_uploaded_file($tmpName)
            || !isset($allowedExt[strtolower(pathinfo($fileName, PATHINFO_EXTENSION))])
        ) {
            // neplatny soubor nebo pripona
            continue;
        }
        if(move_uploaded_file($tmpName, "{$uploadDir}".DIRECTORY_SEPARATOR."{$fileName}"))
        
       { 
            ++$counter;
        }
 
    }
 
    echo "<p>Bylo nahráno {$counter} z ".sizeof($_FILES['nazev']['name'])." obrázků.</p>";
 
}


?>

     <form method="post" enctype="multipart/form-data" action="index.php?content=foto<?php echo"&amp;galerie={$_GET['galerie']}"; ?>">
     <h1>Vložit foto</h1>
     <table cellspacing="0" cellpadding="0">
      <tr><td>
      <input type="file" name="nazev[]" multiple="multiple" />
      </td></tr>
        <tr><td><input type="submit" name="uloz" value="Uložit" /></td></tr>
      <tr><td>
        <input type="hidden" name="id" value="<?php echo $id ?>" /></td></tr>
        
        
          
       
</table>
</form>