如何用wp_insert_post防止重复发帖？

function prevent_duplicate_post($post_data) {
    $content_hash = md5($post_data['post_content']);
    $existing_post = get_page_by_title($content_hash, OBJECT, 'post');

    if ($existing_post) {
        return $existing_post->ID; // 返回已存在的文章ID
    } else {
        return wp_insert_post($post_data); // 插入新文章
    }
}

function prevent_duplicate_post($post_data) {
    $args = array(
        'post_title' => $post_data['post_title'],
        'post_content' => $post_data['post_content'],
        'post_status' => 'publish',
        'posts_per_page' => 1,
        'fields' => 'ids'
    );

    $existing_posts = get_posts($args);

    if (!empty($existing_posts)) {
        return $existing_posts[0]; // 返回已存在的文章ID
    } else {
        return wp_insert_post($post_data); // 插入新文章
    }
}

function prevent_duplicate_post($post_data) {
    $content_hash = md5($post_data['post_content']);
    $existing_post_by_hash = get_page_by_title($content_hash, OBJECT, 'post');

    if ($existing_post_by_hash) {
        return $existing_post_by_hash->ID; // 返回已存在的文章ID
    }

    $args = array(
        'post_title' => $post_data['post_title'],
        'post_content' => $post_data['post_content'],
        'post_status' => 'publish',
        'posts_per_page' => 1,
        'fields' => 'ids'
    );

    $existing_posts_by_title_content = get_posts($args);

    if (!empty($existing_posts_by_title_content)) {
        return $existing_posts_by_title_content[0]; // 返回已存在的文章ID
    }

    return wp_insert_post($post_data); // 插入新文章
}