php自动分割文章字符生成多个文章

<?php  
  
// 获取目标页面的HTML内容  
function getHTML($url) {  
    $opts = [  
        "http" => [  
            "header" => "User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/91.0.4472.124 Safari/537.36"  
        ]  
    ];  
    $context = stream_context_create($opts);  
    // 添加错误处理，以防file_get_contents失败  
    $html = @file_get_contents($url, false, $context);  
    if ($html === false) {  
        die("Error fetching content from $url");  
    }  
    return $html;  
}  
  
// 过滤掉CSS和JS  
function stripScriptsAndStyles($html) {  
    // 使用正则表达式移除<script>和<style>标签及其内容  
    $clean_html = preg_replace('/<script\b[^<]*(?:(?!<\/script>)<[^<]*)*<\/script>/is', '', $html);  
    $clean_html = preg_replace('/<style\b[^<]*(?:(?!<\/style>)<[^<]*)*<\/style>/is', '', $clean_html); 
	$clean_html = preg_replace("/\r?\n|\r/", '', $clean_html);
      
    return $clean_html;  
}  
  
// 分页函数  
function paginate($text, $charsPerPage = 2000) {  
    $pages = [];  
    $totalLength = mb_strlen($text);  
    for ($i = 0; $i < $totalLength; $i += $charsPerPage) {  
        $pages[] = mb_substr($text, $i, $charsPerPage);  
    }  
    return $pages;  
}  

// 目标URL（这里可以改为从GET参数获取）  
if(isset($_GET['bookid'])){
	$bookid = str_replace('%2F', '/', rawurlencode($_GET['bookid']));
}else{
	$bookid = '/book/1.html';//伪静态。但不包含域名网址
}
//$bookid = isset($_GET['bookid']);
$url = "https://www.a.com/" . $bookid;  //目标页面的网址
  
// 获取并处理HTML内容  
$html = getHTML($url);  
$clean_html = stripScriptsAndStyles($html);  
  
// 创建分页  
$pages = paginate($clean_html);  
$totalPages = count($pages);  
  
// 获取当前请求的页面  
$currentPage = isset($_GET['page']) ? (int)$_GET['page'] : 1;  
if ($currentPage < 1) {  
    $currentPage = 1;  
} elseif ($currentPage > $totalPages) {  
    $currentPage = $totalPages;  
}  
  
// 显示当前页面的内容  
if ($currentPage <= $totalPages) {  
    echo '<div class="page-content">';  
    echo $pages[$currentPage - 1];  
    echo '</div>';  
}  
  
// 显示分页链接  
echo '<div class="pagination">';  
for ($i = 1; $i <= $totalPages; $i++) {  
      
        // 添加bookid到分页链接中  
        echo '<a href="?bookid=' . str_replace('%2F', '/', rawurldecode($bookid)) . '&page=' . $i . '">' . $i . ' 章</a> ';  
      
}  
echo '</div>';  
  
?>