php 长文章自动/手动分页类
[code lang="php"]
page_word = 1000;
$this->cut_tag = array("
", "
", "
", "
", "”。", "。", ".", "！", "……", "？", ",");
$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){
$str = "下一页 ";
}
if ($this->sum_page>1 and $this->ipage>1){
$str.= "上一页";
}
return $str;
}
function show_page_select(){
if ($this->sum_page>1){
$str = "
for ($i=1; $i<=$this->sum_page; $i++){
$str.= "";
}
$str.= "";
}
return $str;
}
function show_page_select_wap(){
if ($this->sum_page>1){
$str = "
for ($i=1; $i<=$this->sum_page; $i++){
$str.= "";
}
$str.= "";
}
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;
}
}
?>
实例代码：请以UTF-8的文件编码进行测试。
程序代码
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]."
";
echo $CP->show_prv_next();
[/code]