我创建了一个简单的自定义帖子类型，其中有几个文本框和一个复选框。文本框值在中得到了完美的保存和更新wp_postmeta 表，但我无法保存复选框值。

下面是我的代码：

function clients_custom_metaboxes() {
    // StreetAddress
    add_meta_box(
        \'clients_street\',
        __( \'Street Address\' ),
        \'infotravel_clients_street_metabox\',
        \'clients\'
    );

    ...

    //Visibility
    add_meta_box(
        \'clients_visible\',
        __( \'Show on clients page\' ),
        \'infotravel_clients_visible_metabox\',
        \'clients\'
    );
}

add_action( \'add_meta_boxes\', \'clients_custom_metaboxes\' );

function infotravel_clients_street_metabox( $post ) {
    wp_nonce_field( \'clients_street\', \'clients_street_nonce\' );
    $value = get_post_meta( $post->ID, \'_clients_street\', true );
    ?>
    <input class="trek_inputs required" value="<?php echo $value ?>" type="text" id="txtClientsStreet" name="txtClientsStreet" maxlength="200" required placeholder="Street address" />
    <?php
}

function infotravel_clients_visible_metabox( $post ) {
    wp_nonce_field( \'clients_show\', \'clients_show_nonce\' );
    $value = get_post_meta( $post->ID, \'_clients_show\', true );
    ?>
    <input type="checkbox" id="chkClientShow" name="chkClientShow" value="<?php echo $value ?>" />
    <label for="chkClientShow">Show this client on Clients page</label>
    <?php
}


function infotravel_save_clients_meta( $post_id ) {
    if(
        ! isset( $_POST[\'clients_street_nonce\'] ) ||
        ! isset( $_POST[\'clients_show_nonce\'] ) ) {
        return;
    }

    if( ! current_user_can( \'edit_post\', $post_id) ) {
        return;
    }

    // mandatory fields
    $street_address = sanitize_text_field( $_POST[\'txtClientsStreet\']  );
    $visible        = sanitize_text_field( $_POST[\'chkClientShow\'] );

    $short_address  = $street_address . \', \' . $city . \', \' . $state;
    $full_address   = $short_address . \', \' . $zip . \', \' . $country;

    /**
     * Update meta information
     */

    update_post_meta( $post_id,  \'_clients_street\', $street_address );
    update_post_meta( $post_id,  \'_clients_show\', $visible );
    update_post_meta( $post_id,  \'_clients_short_address\', $short_address );
    update_post_meta( $post_id,  \'_clients_full_address\', $full_address );
}

add_action( \'save_post\',  \'infotravel_save_clients_meta\' );

我错过了什么？

数据库屏幕截图

Further Testing

我增加了一个值(xxxxxxx) 在里面_clients_show 字段并检查我在metabox 创建时间：

function infotravel_clients_visible_metabox( $post ) {
    wp_nonce_field( \'clients_show\', \'clients_show_nonce\' );
    $value = get_post_meta( $post->ID, \'_clients_show\', true );
    print_r($value);
    ?>
    <input type="checkbox" id="chkClientShow" name="chkClientShow" checked="checked" />
    <label for="chkClientShow">Show this client on Clients page</label>
    <?php
}

令人惊讶的是，该值没有显示！！

function infotravel_clients_visible_metabox( $post ) {
    wp_nonce_field( \'clients_show\', \'clients_show_nonce\' );
    $value = get_post_meta( $post->ID, \'_clients_show\', true );
    $is_checked = ($value == 1) ? \'checked\' : \'\';
    ?>
    <input type="checkbox" id="chkClientShow" name="chkClientShow" value="1" <?php echo $is_checked; ?>/>
    <label for="chkClientShow">Show this client on Clients page</label>
    <?php
}

function infotravel_save_clients_meta( $post_id ) 
{
    //
    // ...
    //

    $visible = isset( $_POST[\'chkClientShow\'] ) && $_POST[\'chkClientShow\'] == 1;
    $visible = (int)$visible;
    update_post_meta( $post_id,  \'_clients_show\', $visible );

    //
    // ...
    //
}