/', '', $content);
$content = preg_replace('//', '', $content);
// 按完整段落分割
preg_match_all('/]*>.*?<\/p>|]*>.*?<\/div>|]*>.*?<\/h[1-6]>/s', $content, $paragraphs);
$paragraphs = $paragraphs[0];
// 无段落则按字符分割（兜底）
if (empty($paragraphs)) {
return zb_split_html_by_text_count($content, $target_word_count);
}
// 累加段落字数（保证段落完整）
$public_paragraphs = array();
$hidden_paragraphs = array();
$current_count = 0;
$min_hidden_length = 200; // 最小隐藏字数：不足则不隐藏
foreach ($paragraphs as $para) {
$para_text = strip_tags($para);
$para_text = preg_replace('/\s+/', '', $para_text);
$para_count = mb_strlen($para_text, 'UTF-8');
if ($current_count < $target_word_count) {
$public_paragraphs[] = $para;
$current_count += $para_count;
} else {
$hidden_paragraphs[] = $para;
}
}
// 检查隐藏内容长度，不足则不隐藏
$hidden_text = strip_tags(implode('', $hidden_paragraphs));
$hidden_text = preg_replace('/\s+/', '', $hidden_text);
$hidden_count = mb_strlen($hidden_text, 'UTF-8');
if ($hidden_count < $min_hidden_length) {
return array('public' => $content, 'hidden' => '');
}
// 拼接内容（补全剩余文本）
$public_content = implode('', $public_paragraphs);
$hidden_content = implode('', $hidden_paragraphs);
$all_public = preg_quote($public_content, '/');
$remaining = preg_replace('/^'.$all_public.'/', '', $content);
if (!empty($remaining)) {
$hidden_content .= $remaining;
}
return array('public' => $public_content, 'hidden' => $hidden_content);
}
// 7. 辅助函数：纯字符分割（兜底用）
function zb_split_html_by_text_count($html, $limit) {
$pure_text = strip_tags($html);
$pure_text = preg_replace('/\s+/', '', $pure_text);
$total_count = mb_strlen($pure_text, 'UTF-8');
if ($total_count <= $limit) {
return array('public' => $html, 'hidden' => '');
}
$char_count = 0;
$in_tag = false;
$public_content = '';
$hidden_content = '';
$html_length = strlen($html);
$split_reached = false;
$self_closing_tags = array('img', 'br', 'input', 'meta', 'link', 'hr', 'area', 'base');
for ($i = 0; $i < $html_length; $i++) {
$char = $html[$i];
if ($char == '<') {
$in_tag = true;
} elseif ($char == '>') {
$in_tag = false;
}
if (!$split_reached) {
$public_content .= $char;
if (!$in_tag && preg_match('/[\x{4e00}-\x{9fa5}a-zA-Z0-9]/u', $char)) {
$char_count++;
if ($char_count >= $limit) {
$split_reached = true;
$public_content = zb_close_unclosed_tags($public_content);
}
}
} else {
$hidden_content .= $char;
}
}
return array('public' => $public_content, 'hidden' => $hidden_content);
}
// 8. 辅助函数：补全未闭合标签
function zb_close_unclosed_tags($html) {
preg_match_all('#<([a-z0-9]+)(?:\s+[^>]+)?(?#i', $html, $open_tags);
preg_match_all('##i', $html, $close_tags);
$open_tags = $open_tags[1];
$close_tags = $close_tags[1];
$self_closing_tags = array('img', 'br', 'input', 'meta', 'link', 'hr', 'area', 'base');
$unclosed = array_reverse(array_diff($open_tags, $close_tags));
foreach ($unclosed as $tag) {
if (!in_array(strtolower($tag), $self_closing_tags)) {
$html .= '';
}
}
return $html;
}
// 9. 主逻辑：自动隐藏文章后半段（全站通用解锁）
add_filter('the_content', 'zb_auto_hide_post_content', 99);
function zb_auto_hide_post_content($content) {
// 仅对文章页生效，排除后台/其他页面
if (!is_single() || is_admin()) return $content;
$post_id = get_the_ID();
// 排除指定分类/爬虫：直接显示完整内容
if (zb_is_excluded_category($post_id) || zb_is_search_engine_crawler()) return $content;
// 全站通用解锁判断：有全局Cookie则显示完整内容
$is_unlocked = isset($_COOKIE['wp_unlock_global']) && $_COOKIE['wp_unlock_global'] == 'valid';
if ($is_unlocked) return $content;
// 配置：目标公开字数（优先按完整段落分割）
$target_word_count = 200;
$split_result = zb_split_content_by_complete_paragraphs($content, $target_word_count);
$public_content = $split_result['public'];
$hidden_content = $split_result['hidden'];
// 隐藏内容为空则直接返回完整内容
if (empty($hidden_content)) return $content;
// 拼接解锁表单（优化样式）
$final_content = $public_content . '
🔒 剩余内容需解锁后查看
1. 关注公众号【魅魔工坊】
2. 回复关键词【解锁】获取通行码
3. 输入通行码即可查看全站完整内容
立即解锁全站内容
' . $hidden_content . '
';
return $final_content;
}
// 10. JS/CSS：前端交互（含旧Cookie清理）
add_action('wp_footer', 'zb_unlock_content_scripts');
function zb_unlock_content_scripts() {
if (!is_single()) return;
?>
