当用户在woocommerce上选择一个州时，我试图显示一个城市列表，有些人很幸运能做到这一点？？

我发现以下代码：

add_filter( \'woocommerce_checkout_fields\' , \'override_checkout_fields\' );

// Our hooked in function - $fields is passed via the filter!
function override_checkout_fields( $fields ) {
     unset($fields[\'billing\'][\'billing_city\']);
     unset($fields[\'shipping\'][\'shipping_city\']);
     return $fields;
}

add_filter( \'woocommerce_checkout_fields\' , \'custom_override_checkout_fields\' );

// Our hooked in function - $fields is passed via the filter!
function custom_override_checkout_fields( $fields ) {
     $fields[\'billing\'][\'billing_ciudad\']= array(
    \'type\' => \'select\',
    \'label\'     => __(\'Ciudad\', \'woocommerce\'),
    \'placeholder\'   => _x(\'San Salvador\', \'placeholder\', \'woocommerce\'),
    \'required\'  => true,
    \'class\'     => array(\'form-row-wide\'),
    \'clear\'     => true,
     );


     $fields[\'billing\'][\'billing_ciudad\'][\'options\'] = array(
        \'option_1\' => \'Col. Escalon\',
        \'option_2\' => \'Otro ciudad o colonia\'
        );


     return $fields;
}