No data output after submit selected option

I got this peace of code now and I will explain what is happening and what I want:

[php]









Op merk zoeken
Merk:

- Merk - <?php $wielen = $wielclass->getMerkenWielen($website); $get_wiel = isset($_GET['wiel']) ? $_GET['wiel'] : ''; $post_wiel = isset($_POST['band_merk']) ? $_POST['band_merk'] : ''; foreach($wielen as $wiel) { if ($_SERVER['REQUEST_METHOD'] === 'POST') { $selected = $post_wiel['wiel'] === $wiel->merk_code ? ' selected="selected"' : '' ; } else { $selected = $get_wiel['wiel'] === $wiel->merk_code ? ' selected="selected"' : '' ; } echo '\t\t\t\t\t\t\t\t\t\t\t' . $wiel->merk_naam . ''; } ?>
									</select>
								</td>
							</tr>
							<tr>
								<td>&nbsp;</td>
								<td><input type="submit" name="band_submit" value="Zoek"/></td>
							</tr>
						</table>
					</form>
				</div>
                                                        <?php

if(isset($_POST[‘band_submit’]) && $_POST[‘band_merk’] == $wiel->merk_code)
echo $wiel->merk_naam;
?>[/php]

Precess code:

[php]if(isset($_POST[‘band_submit’]) && $_POST[‘band_merk’] == $wiel->merk_code)
echo $wiel->merk_naam;[/php]

My Class

[php]<?php

class wielen extends connect
{
private $wielenlijst;

public function getMerkenWielen($database)
{
    $sql = "SELECT * FROM ".$database."_wielen ORDER BY merk_nummer";
    try
    {
        $stmt = $this->db->prepare($sql);
        
        $stmt->execute(); 
        $this->wielenlijst = $stmt->fetchAll(PDO::FETCH_OBJ);
        $stmt->closeCursor();

        return $this->wielenlijst;
    }
    catch (Exception $e)
    {
        die ($e->getMessage());
    }
}


public function __construct($dbo)
{
    parent::__construct($dbo);
}

}

?>
[/php]

I get a selectbox with four options out of my database so that is working correct. These options has data in it like a picture and text. When I select one and press submit he has to show the information of the selected option and that should stay selected.

What is happening now is that when I select a option and press submit nothing happens… The button is working but I dont get any output of the selected option and it wont stay selected.

Doing something wrong but I cant figure out what

Any help is welcome:)

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