以编程方式每天创建一次帖子

通过以下方式this howto, 我想以编程方式每天创建一篇帖子。根据作者的意见，下一行将检查是否已经存在具有给定名称的帖子：

if( null == get_page_by_title( $title ) ) {
    // Create the page
} else {
    // The page exists
} // end if

但这不起作用，因为我的WP生成了多个标题相同的帖子，因为我将该函数添加到了函数中。php。Wordpress抄本says 那个get_page_by_title():

检索给定标题的帖子。如果有多篇文章使用相同的标题，则返回ID最小的文章。

因此，如果我正确理解get_page_by_title( $title ) 不可能是null. 这里怎么了？

我使用的完整代码：

/**
 * A function used to programmatically create a post in WordPress. The slug, author ID, and title
 * are defined within the context of the function.
 *
 * @returns -1 if the post was never created, -2 if a post with the same title exists, or the ID
 *          of the post if successful.
 */
function programmatically_create_post() {

    // Initialize the page ID to -1. This indicates no action has been taken.
    $post_id = -1;

    // Setup the author, slug, and title for the post
    $author_id = 1;
    $slug = \'digest-\' . date( \'d-m-Y\', strtotime( "-1 days" ) );
    $title = \'Digest - \' . date( \'d-m-Y\', strtotime( "-1 days" ) );

    // If the page doesn\'t already exist, then create it
    if( null == get_page_by_title( $title ) ) {

        // Set the post ID so that we know the post was created successfully
        $post_id = wp_insert_post(
            array(
                \'comment_status\'    =>  \'closed\',
                \'ping_status\'       =>  \'closed\',
                \'post_author\'       =>  $author_id,
                \'post_name\'         =>  $slug,
                \'post_title\'        =>  $title,
                \'post_status\'       =>  \'pending\',
                \'post_type\'         =>  \'post\'
            )
        );

    // Otherwise, we\'ll stop
    } else {

            // Arbitrarily use -2 to indicate that the page with the title already exists
            $post_id = -2;

    } // end if

} // end programmatically_create_post
add_filter( \'after_setup_theme\', \'programmatically_create_post\' );

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