WordPress：将复选框添加到自定义分类添加/编辑表单

Question

I need to add a list of check-boxes to custom taxonomy add/edit form. I have this code for adding a text field for custom taxonomy form in my plugin and it works fine:

    <?php
    function taxonomy_edit_meta_field($term) {
        $t_id = $term->term_id;
        $term_meta = get_option( "taxonomy_$t_id" ); 
    ?>

        <tr class="form-field">
            <th scope="row" valign="top"><label for="term_meta[custom_term_meta]"><?php _e( 'Term:' ); ?></label></th>
            <td>
                <input type="text" name="term_meta[custom_term_meta]" id="term_meta[custom_term_meta]" value="<?php echo esc_attr( $term_meta['custom_term_meta'] ) ? esc_attr( $term_meta['custom_term_meta'] ) : ''; ?>">
            </td>
        </tr>

    <?php
    }
    add_action( 'product_cat_edit_form_fields', 'taxonomy_edit_meta_field', 10, 2 );

    function save_taxonomy_custom_meta( $term_id ) {
        if ( isset( $_POST['term_meta'] ) ) {
            $t_id = $term_id;
            $term_meta = get_option( "taxonomy_$t_id" );
            $cat_keys = array_keys( $_POST['term_meta'] );
            foreach ( $cat_keys as $key ) {
                if ( isset ( $_POST['term_meta'][$key] ) ) {
                    $term_meta[$key] = $_POST['term_meta'][$key];
                }
            }
            update_option( "taxonomy_$t_id", $term_meta );
        }
    }  
    add_action( 'edited_product_cat', 'save_taxonomy_custom_meta', 10, 2 );  
    add_action( 'create_product_cat', 'save_taxonomy_custom_meta', 10, 2 );

How I can add a list of check-boxes in the same way?

Answer 1

There were a problem with the saving not checked check-box input. I have fixed it with input type="hidden" with the same value of "name" attribute, as in check-box input.

    <tr class="form-field">
        <th scope="row" valign="top"><label for="term_meta[custom_term_meta]"><?php _e( 'Color:' ); ?></label></th>
        <td>
            <input type="hidden" value="0" name="term_meta[pa_color_attr]">
            <input type="checkbox" <?php echo (!empty($term_meta['pa_color_attr']) ? ' checked="checked" ' : 'test'); ?> value="1" name="term_meta[pa_color_attr]" />
        </td>
    </tr>