php 长文章自动/手动分页类

<?php

/*

* 长文章分页类

* @package cutpage

* @author yytcpt(无影)

* @version 2008-03-27

* @copyrigth http://www.d5s.cn/

*/

class cutpage{

var $pagestr; //被切分的内容

var $pagearr; //被切分文字的数组格式

var $sum_word; //总字数(UTF-8格式的中文字符也包括)

var $sum_page; //总页数

var $page_word; //一页多少字

var $cut_tag; //自动分页符

var $cut_custom; //手动分页符

var $ipage; //当前切分的页数，第几页

var $url;

function __construct(){

$this->page_word = 1000;

$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;

}

//统计总字数

function get_page_word(){

$this->sum_word = $this->strlen_utf8($this->pagestr);

return $this->sum_word;

}

/* 统计UTF-8编码的字符长度

* 一个中文，一个英文都为一个字

*/

function strlen_utf8($str){

$i = 0;

$count = 0;

$len = strlen ($str);

while ($i < $len){

$chr = ord ($str[$i]);

$count++;

$i++;

if ($i >= $len)

break;

if ($chr & 0x80){

$chr <<= 1;

while ($chr & 0x80) {

$i++;

$chr <<= 1;

}

}

}

return $count;

}

//设置自动分页符号

function set_cut_tag($tag_arr=array()){

$this->cut_tag = $tag_arr;

}

//设置手动分页符

function set_cut_custom($cut_str){

$this->cut_custom = $cut_str;

}

function show_cpage($ipage=0){

$this->cut_str();

$ipage = $ipage ? $ipage:$this->ipage;

return $this->pagearr[$ipage];

}

function cut_str(){

$str_len_word = strlen($this->pagestr); //获取使用strlen得到的字符总数

$i = 0;

if ($str_len_word<=$this->page_word){ //如果总字数小于一页显示字数

$page_arr[$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个文字 cutStr为func.global中的函数

foreach ($this->cut_tag as $v){

$cut_start = strrpos($str_first, $v); //逆向查找第一个分页符的位置

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){ //如果超过总字数

$page_arr[$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个字后的page_word个字符

$cut_tmp = strrpos($str_tmp, $v); //找出从第cut_start个字之后，page_word个字之间，逆向查找第一个分页符的位置

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); //总页数

$this->pagearr = $page_arr;

}

//显示上一条，下一条

function show_prv_next(){

$this->set_url();

if ($this->sum_page>1 and $this->ipage<$this->sum_page){

$str = "<a href='".$this->url.($this->ipage+1)."'>下一页</a>　";

}

if ($this->sum_page>1 and $this->ipage>1){

$str.= "<a href='".$this->url.($this->ipage-1)."'>上一页</a>";

}

return $str;

}

function show_page_select(){

if ($this->sum_page>1){

$str = " <select οnchange=/"location.href=this.options[this.selectedIndex].value/">";

for ($i=1; $i<=$this->sum_page; $i++){

$str.= "<option value='".$this->url.$i."' ".(($this->ipage)==$i ? " selected='selected'":"").">第".$i."页</option>";

}

$str.= "</select>";

}

return $str;

}

function show_page_select_wap(){

if ($this->sum_page>1){

$str = "<select ivalue='".($this->ipage-1)."'>";

for ($i=1; $i<=$this->sum_page; $i++){

$str.= "<option onpick='".$this->url.$i."'>第".$i."节</option>";

}

$str.= "</select>";

}

return $str;

}

function set_url(){

parse_str($_SERVER["QUERY_STRING"], $arr_url);

unset($arr_url["ipage"]);

if (emptyempty($arr_url)){

$str = "ipage=";

}else{

$str = http_build_query($arr_url)."&ipage=";

}

$this->url = "http://".$_SERVER["HTTP_HOST"].$_SERVER["PHP_SELF"]."?".$str;

}

}

?>

实例代码：请以UTF-8的文件编码进行测试。

include('cutpage.php');

header("content-type:text/html;charset=utf-8");//设置页面编码

//自定义的长文章字符串，可以包含 html 代码，若字符串中有手动分页符 {nextpage} 则优先按手动分页符进行分页

$content = file_get_contents('text.txt');

$ipage = $_GET["ipage"]? intval($_GET["ipage"]):1;

$CP = new cutpage();

$CP->pagestr = $content;

$CP->cut_str();

echo $CP->pagearr[$ipage-1]."<hr/>";

echo $CP->show_prv_next();