我正在尝试创建一个帖子，如果它不存在，并根据其标题更新帖子（如果存在）。标题是唯一的，因为它是用户的用户名。

但是，更新功能不起作用。始终会创建一个新帖子。

以下代码创建并应更新帖子：

<td><input type="submit" class="button button-primary" name="info_update_config" value="Save Changes" /></td>    


    <?php

function wp_exist_post_by_title($title)
{
    global $wpdb;
    $return = $wpdb->get_row("SELECT ID FROM wp_posts WHERE post_title = \'" . $title . "\' && post_status = \'publish\' && post_type = \'post\' ", \'ARRAY_N\');
    if (empty($return)) {
        return false;
    } else {
        return true;
    }
}

if (isset($_POST[\'info_update_config\'])) {

    $current_user = wp_get_current_user();
    $user_id      = get_current_user_id();

    // usage
    if (wp_exist_post_by_title($current_user->user_login)) {

        $id = $wpdb->get_row("SELECT ID FROM wp_posts WHERE post_title = \'" . $title . "\' && post_status = \'publish\' && post_type = \'post\' ", \'ARRAY_N\');

        $my_post = array(
            \'ID\' => $id,
            \'post_title\' => $current_user->user_login,
            \'post_content\' => $current_user->user_email
        );

        // Update the post into the database
        wp_update_post($my_post);

        // save a basic text value
        $field_key = "field_577431181309c";
        $value     = $uids;
        update_field($field_key, $value, $my_post);

    } else {

        $my_post = array(
            \'post_title\' => $current_user->user_login,
            \'post_content\' => $current_user->user_email,
            \'post_status\' => \'draft\',
            \'post_author\' => $user_id
        );

        // Insert the post into the database
        $postID = wp_insert_post($my_post);

        // save a basic text value
        $field_key = "field_577431181309c";
        $value     = $uids;
        update_field($field_key, $value, $postID);
    }
}
//}

?>

亲切的问候！