$html = '<div class="urun">';
$html .= '<select id="hesaplar" onchange="urunYakala(this, \''.$currenysym.'\')">'; /*** Buraya currenysym kodunu ekledim Ekledim ***/
$argumen = array(
        'meta_key' => '_price',
        'orderby' => 'meta_value_num',
        'order' => 'ASC',
        'limit'=> -1,
        'category' => array( 'denemekategorisi' ),
        'status' => 'publish',
);
$producter = wc_get_products( $argumen );
foreach ($producter as $producted) {
    $urunbaslik = $producted->get_name();
    $urunfiyat = number_format($producted->get_price(), 2, '.', '');
    $urunid = $producted->get_id();
    $urunadi = explode(" ", $urunbaslik);
    $urunayrac = str_replace( array("@", "_", "."), '', $urunadi[1]);
    $html .= '<option value="'. $urunid .'">'. $urunayrac . ' ' . $urunfiyat .'</option>';
}
$html .= '</select>';
$html .= '</div>';
$html .= '<script>';
$html .= 'function urunYakala(select, currency) {';
$html .= '    var urun_id = select.options[select.selectedIndex].value;';
$html .= '    var urun_ayraci = select.options[select.selectedIndex].text.split(" ")[0];'; /*** Ayracı neye göre parse edeceğini kendin düzenlemelisin ***/
$html .= '    var urun_adi = select.options[select.selectedIndex].text.split(" ")[0];';
$html .= '    var urun_fiyati = select.options[select.selectedIndex].text.split(" ")[1];';
$html .= '    $("div.urun" + urun_id + " .fiyatgoruntusu").html("Fiyat: " + urun_fiyati + " " + currency);';
$html .= '    $("div.urun" + urun_id + " .gorsel").attr("src","https://www.spspsp.com/wp-content/uploads/" + urun_ayraci + ".jpg");';
$html .= '    $("div.urun" + urun_id + " .gorsel").attr("alt",urun_adi);';
$html .= '}';
$html .= '</script>';
return $html;