如果用户没有撰写帖子，此代码将引导其退出。在本示例中，状态为的帖子publish 被视为“作者”。

我在代码中添加了一些注释，以引导您了解正在发生的事情-如果您有任何问题，请联系我。

<?php

// Ensure non-published users can\'t see what\'s going on.
add_action( \'init\', function() {
    // Don\'t run in the admin area.
    if ( is_admin() ) {
        return;
    }

    // Only display this on "single" pages.
    if ( ! is_single() ) {
        return;
    }

    $user_id = get_current_user_id();

    // The user isn\'t a user, bail.
    if ( ! $user_id ) {
        return;
    }

    $query = <<<SQL
SELECT
    COUNT(*) published
FROM
    {$GLOBALS[\'wpdb\']->posts}
WHERE
    post_author = %d
AND
    post_type = %s
AND
    post_status = \'publish\'
SQL;

    $result = $GLOBALS[\'wpdb\']->get_results(
        $GLOBALS[\'wpdb\']->prepare(
            $query,
            $user_id,
            \'post\' // Replace this with your Custom Post Type, if you\'re not using Post.
        )
    );

    // The current user has author posts, bail.
    if ( ! empty( $result ) ) {
        return;
    }

    // Handle code to kick people out.
    wp_safe_redirect( \'/error-page/\' );
    exit;
} );