你所需要做的就是save_post 钩方法如下：

function change_post_status_based_on_custom_field( $post_id ) {
    // If this is just a revision, don\'t do anything.
    if ( wp_is_post_revision( $post_id ) )
        return;

    // Get field value
    $value = get_post_meta( $post_id, \'played\', true );

    $status = $value ? \'publish\' : \'draft\';

    // If status should be different, change it
    if ( get_post_status( $post_id ) != $status ) {
        // unhook this function so it doesn\'t loop infinitely
        remove_action( \'save_post\', \'change_post_status_based_on_custom_field\' );

        // update the post, which calls save_post again
        wp_update_post( array(
            \'ID\' => $post_id,
            \'post_status\' => $status
        ) );

        // re-hook this function
        add_action( \'save_post\', \'change_post_status_based_on_custom_field\' );
    }
}
add_action( \'save_post\', \'change_post_status_based_on_custom_field\' );

在这里粘贴的代码可能相当多，但您的策略应该遵循以下几点：

钩住post\\u保存事件：创建一个已经检查过的静态变量，以防止在此函数中更新post时出现无限递归