php有对内容进行分页的“组件”吗？

<code>$content = '123123123123123123123[page]123123123123123';
$page = explode('[page]', $content);
echo $page[0];</code>

<code>$content = '123123123123123123123
123123123123123
123123123123123
123123123123123
123123123123123
123123123123123
123123123123123
';
$lines = explode("\n", $content);
//第几页
$page = 1;
//每页显示多少行
$page_size = 2;
//当前页应该显示的行
$current_content = array_slice($lines, ($page-1)*$pagesize, $page_size);
//输出
echo implode("\n", $current_content);</code>

<code>function mb_str_split($str, $length = 1, $encoding = 'utf-8') {
    if ($length < 1){
        return false;
    } 
    for ($result = array(), $i = 0; $i < mb_strlen($str, $encoding); $i += $length){
        $result[] = mb_substr($str, $i, $length, $encoding);
    }
    return $result;
}
$content = '123123123123123123123
123123123123123
123123123123123
123123123123123
123123123123123
123123123123123
123123123123123
';
$words = mb_str_split($content);
//第几页
$page = 1;
//每页显示多少个字
$page_size = 10;
//当前页应该显示的字数
$current_content = array_slice($words, ($page-1)*$pagesize, $page_size);
//输出
echo implode("\n", $current_content);
//PS 需要考虑空行，空格这些字</code>