<?php 
/* 
* 長(zhǎng)文章分頁(yè)類 
*/ 
class cutpage{ 
private $pagestr; //被切分的內(nèi)容 
private $pagearr; //被切分文字的數(shù)組格式 
private $sum_word; //總字?jǐn)?shù)(UTF-8格式的中文字符也包括) 
private $sum_page; //總頁(yè)數(shù) 
private $page_word; //一頁(yè)多少字 
private $cut_tag; //自動(dòng)分頁(yè)符 
private $cut_custom; //手動(dòng)分頁(yè)符 
private $ipage; //當(dāng)前切分的頁(yè)數(shù)，第幾頁(yè) 
private $url; 
function __construct($pagestr,$page_word=1000){ 
$this->page_word = $page_word; 
$this->cut_tag = array("</table>", "</div>", "</p>", "<br/>", "”。", "。", ".", "！", "……", "？", ","); 
$this->cut_custom = "{nextpage}"; 
$tmp_page = intval(trim($_GET["ipage"])); 
$this->ipage = $tmp_page>1?$tmp_page:1; 
$this->pagestr = $pagestr; 
} 
function cut_str(){ 
$str_len_word = strlen($this->pagestr); //獲取使用strlen得到的字符總數(shù) 
$i = 0; 
if ($str_len_word<=$this->page_word){ //如果總字?jǐn)?shù)小于一頁(yè)顯示字?jǐn)?shù) 
$page_arr[$i] = $this->pagestr; 
}else{ 
if (strpos($this->pagestr, $this->cut_custom)){ 
$page_arr = explode($this->cut_custom, $this->pagestr); 
}else{ 
$str_first = substr($this->pagestr, 0, $this->page_word); //0-page_word個(gè)文字 cutStr為func.global中的函數(shù) 
foreach ($this->cut_tag as $v){ 
$cut_start = strrpos($str_first, $v); //逆向查找第一個(gè)分頁(yè)符的位置 
if ($cut_start){ 
$page_arr[$i++] = substr($this->pagestr, 0, $cut_start).$v; 
$cut_start = $cut_start + strlen($v); 
break; 
} 
} 
if (($cut_start+$this->page_word)>=$str_len_word){ //如果超過(guò)總字?jǐn)?shù) 
$page_arr[$i++] = substr($this->pagestr, $cut_start, $this->page_word); 
}else{ 
while (($cut_start+$this->page_word)<$str_len_word){ 
foreach ($this->cut_tag as $v){ 
$str_tmp = substr($this->pagestr, $cut_start, $this->page_word); //取第cut_start個(gè)字后的page_word個(gè)字符 
$cut_tmp = strrpos($str_tmp, $v); //找出從第cut_start個(gè)字之后，page_word個(gè)字之間，逆向查找第一個(gè)分頁(yè)符的位置 
if ($cut_tmp){ 
$page_arr[$i++] = substr($str_tmp, 0, $cut_tmp).$v; 
$cut_start = $cut_start + $cut_tmp + strlen($v); 
break; 
} 
} 
} 
if (($cut_start+$this->page_word)>$str_len_word){ 
$page_arr[$i++] = substr($this->pagestr, $cut_start, $this->page_word); 
} 
} 
} 
} 
$this->sum_page = count($page_arr); //總頁(yè)數(shù) 
$this->pagearr = $page_arr; 
return $page_arr; 
} 
//顯示上一條，下一條 
function pagenav(){ 
$this->set_url(); 
$str = ''; 
//$str .= $this->ipage.'/'.$this->sum_page; 
for($i=1;$i<=$this->sum_page;$i++){ 
if($i==$this->ipage) { 
$str.= "<a href='#' class='cur'>".$i."</a> "; 
}else{ 
$str.= "<a href='".$this->url.$i."'>".$i."</a> "; 
} 
} 
return $str; 
} 
function set_url(){ 
parse_str($_SERVER["QUERY_STRING"], $arr_url); 
unset($arr_url["ipage"]); 
if (empty($arr_url)){ 
$str = "ipage="; 
}else{ 
$str = http_build_query($arr_url)."&ipage="; 
} 
$this->url = "http://".$_SERVER["HTTP_HOST"].$_SERVER["PHP_SELF"]."?".$str; 
} 
} 
?> 

<?php 
$content = file_get_contents('text.txt'); 
$ipage = $_GET["ipage"]? intval($_GET["ipage"]):1; 
$CP = new cutpage($content); 
$page = $CP->cut_str(); 
echo $page[$ipage-1]; 
echo $CP->pagenav(); 
?>