Nefunguje mi kod k nahrani obrázku do databaze skrze mysqli

$file_name = $_FILES; $tmp_name = $_FILES; $file_array = explode(".", $file_name); $file_extension = end($file_array); if(file_already_uploaded($file_name, $connect)){ $file_name = $file_array . '-'. rand() . '.' . $file_extension; } $location = '../../uploads/' . $file_name; if(move_uploaded_file($tmp_name, $location)){ $sql = "INSERT INTO soubory (image_name, image_description) VALUES ('".$file_name."', '')"; $result = $conn->query($sql); }}} function file_already_uploaded($file_name, $connect){ $sql = "SELECT * FROM soubory WHERE image_name = '".$file_name."'"; $result = $conn->query($sql); $number_of_rows = $result->rowCount(); if($number_of_rows > 0){ return true; } else { return false; } } ?>