when i execute this file.php only it will upload, when i run in Mainlayout.php its not uploading. Below file is File.php, its to upload csv file.. Canone help me plzzzzzzzz

<form name="import" method="post" enctype="multipart/form-data">
            <input type="file" name="file" />
            <input type="submit" name="submit" value="Submit" />
        </form>
        <?php
        include ("connection1.php");

        if (isset(_POST["submit"])) {
            $file = _FILES['file']['tmp_name'];
            $handle = fopen($file, "r");
            $c = 0;
            while (($filesop = fgetcsv($handle, 1000, ",")) !== false) {
                $contact = $filesop[0];


                if (preg_match('/(7|8|9)\d{9}/', $contact)) { // phone number is valid

                    $sql = mysql_query("INSERT INTO csv1 (contact) VALUES ('$contact')");
                    $c = $c + 1;
                } 
            }

            if ($sql) {
                echo "Your Database Has Imported Successfully. You have Inserted " . $c . " Records";
            } else {
                echo "Sorry! There is a Some Problem.";
            }
        }
        ?>

    </div>
    </body>