PHP长文章分页的使用例子

2024-05-04 23:07:00

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文章分页用到比较多同时使用过cms的朋友也碰到过都具备了文章分页功能了,下面我们自己来看一个关于文章分页的例子,具体的操作步骤如下所示,希望文章能够帮助到各位朋友.

content.txt:这个文件里面放的是内容了,如果你是与mysql数据库结合的话只要把把这一句换成你的数据库的内容即可.

index.php文件:

<link rel="stylesheet" type="text/css" href="http:///jquery/css/common.css" />

        <style type="text/css">

            .demo{width:80%;margin:50px auto 10px auto;padding:10px;}

            .demo p{line-height:30px;text-indent:2em}

            .demo h3{font-size:24px;text-align:center;padding:10px}

            @media (max-width: 480px){

                .demo{width:360px;margin:50px auto 10px auto;padding:10px;}

                .demo img{width:90%}

                .demo h3{font-size:1.5em;line-height:1.9em}

            }

            .pages{text-align:center;border-top:1px solid #d3d3d3;margin-top:10px; padding-top:10px}

            .pages a{display:inline-block;margin:4px;padding:4px 8px;background:#f9f9f9;border:1px solid #d9d9d9}

            .pages a.cur{cursor:default;background:#d3d3d3;color:#434343}

            .pages a.cur:hover{text-decoration:none}

        </style>

        <div class="head">

            <div class="head_inner clearfix">

                <ul id="nav">

                    <li><a href="http://">首页</a></li>

                    <li><a href="http:///templates">网站模板</a></li>

                    <li><a href="http:///js">网页特效</a></li>

                    <li><a href="http:///php">PHP</a></li>

                    <li><a href="http:///site">精选网址</a></li>

                </ul>

                <a class="logo" href="http://"><img src="http:///Public/images/logo.jpg" alt="素材火logo" /></a>

            </div>

        </div>

        <div class="container">

            <div class="demo">

                <h2 class="title"><a href="http:///js/639.html">教程：PHP长文章分页教程与演示</a></h2>

                <h3>未来10年千万人将没有工作？</h3>

                <?php

                include('page.class.php');

                //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('content.txt');

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

                $CP = new cutpage($content);

                $page = $CP->cut_str();

                echo $page[$ipage - 1];

                echo '<div class="pages">' . $CP->pagenav() . '</div>';

                ?>

            </div>

        </div>

长文章分页类 page.class.php:

<?php

/*

*  长文章分页类

*/

    class cutpage{

        private $pagestr;       //被切分的内容

        private $pagearr;       //被切分文字的数组格式

        private $sum_word;      //总字数(UTF-8格式的中文字符也包括)

        private $sum_page;      //总页数

        private $page_word;     //一页多少字

        private $cut_tag;       //自动分页符

        private $cut_custom;    //手动分页符

        private $ipage;         //当前切分的页数，第几页

        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}";

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

            $this->ipage = $tmp_page>1?$tmp_page:1;

   $this->pagestr = $pagestr;

        }

        //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;

   return $page_arr;

        }

        //显示上一条，下一条

        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 show_prv_next2(){

            $this->set_url();

            $str = '';







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

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

            }

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

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

            }

            return $str;

        }

        function show_page_select(){

            if ($this->sum_page>1){

                $str = "   <select onchange='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"]);//Vevb.com

            if (emptyempty($arr_url)){

                $str = "ipage=";

            }else{

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

            }

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

        }

    }

?>