WooCommerce Multi Select for a Single Product Field

Question

I am trying to add a list box on a single product page, I was wondering if there are options for multiselect in woocommerce, for get_optionwoocommerce fields that support multiselect, but for post_metawoocommerce only one choice, I'm not sure if there is any restriction in woocommerce or I could skip something to get multi-selection? Here is the code below that I tried

 function create_multiselect() { 

    woocommerce_wp_select(array(
                'id' => 'newoptions',
                'class' => 'newoptions',
                'label' => __('Testing Multiple Select', 'woocommerce'),
                'options' => array(
                    '1' => 'User1',
                    '2' => 'User2',
                    '3' => 'User3',
                ))
            );

    }

    add_action("woocommerce_product_options_pricing","create_multiselect");

Any suggestion would be great.

Answer 1

woocommerce_wp_select() , wc-meta-box-functions.php /woocommerce/includes/admin, .

, Woo , ( ). , , ( post meta ).

function woocommerce_wp_select_multiple( $field ) {
    global $thepostid, $post, $woocommerce;

    $thepostid              = empty( $thepostid ) ? $post->ID : $thepostid;
    $field['class']         = isset( $field['class'] ) ? $field['class'] : 'select short';
    $field['wrapper_class'] = isset( $field['wrapper_class'] ) ? $field['wrapper_class'] : '';
    $field['name']          = isset( $field['name'] ) ? $field['name'] : $field['id'];
    $field['value']         = isset( $field['value'] ) ? $field['value'] : ( get_post_meta( $thepostid, $field['id'], true ) ? get_post_meta( $thepostid, $field['id'], true ) : array() );

    echo '<p class="form-field ' . esc_attr( $field['id'] ) . '_field ' . esc_attr( $field['wrapper_class'] ) . '"><label for="' . esc_attr( $field['id'] ) . '">' . wp_kses_post( $field['label'] ) . '</label><select id="' . esc_attr( $field['id'] ) . '" name="' . esc_attr( $field['name'] ) . '" class="' . esc_attr( $field['class'] ) . '" multiple="multiple">';

    foreach ( $field['options'] as $key => $value ) {

        echo '<option value="' . esc_attr( $key ) . '" ' . ( in_array( $key, $field['value'] ) ? 'selected="selected"' : '' ) . '>' . esc_html( $value ) . '</option>';

    }

    echo '</select> ';

    if ( ! empty( $field['description'] ) ) {

        if ( isset( $field['desc_tip'] ) && false !== $field['desc_tip'] ) {
            echo '<img class="help_tip" data-tip="' . esc_attr( $field['description'] ) . '" src="' . esc_url( WC()->plugin_url() ) . '/assets/images/help.png" height="16" width="16" />';
        } else {
            echo '<span class="description">' . wp_kses_post( $field['description'] ) . '</span>';
        }

    }
    echo '</p>';
}

:

woocommerce_wp_select_multiple( array(
    'id' => 'newoptions',
    'name' => 'newoptions[]',
    'class' => 'newoptions',
    'label' => __('Testing Multiple Select', 'woocommerce'),
    'options' => array(
        '1' => 'User1',
        '2' => 'User2',
        '3' => 'User3',
    ))
);