PHP implementation of paging: text paging and number paging, _PHP tutorial

<span>// 分页分装</span><span>
<span>/**</span>
<span>*   $pageType   分页类型 1是数字分页  2是文本分页</span>
<span>*  可以将$pageTotal,$page,$total等数据作为参数传递，或者在paging作为全局变量（推荐）</span>
<span>*/</span>
<span>function</span> paging($pageType)
{
    <span>global</span> $pageTotal,$page,$total;
    <span>if</span>($pageType == 1)
    {
        <span>echo</span> <span>'<div id="pagenum">'</span>;
            <span>echo</span><span>'<ul>'</span>;
                <span>for</span>($i=0; $i < $pageTotal; $i++)
                { 
                    <span>if</span>($page == ($i+1))
                    {
                        <span>echo</span> <span>'<li><a href="blogfriends.php?page='</span>.($i+1).<span>'" class="selected">'</span>.($i+1).<span>'</a></li>'</span>;
                    }
                    <span>else</span>
                    {
                        <span>echo</span> <span>'<li><a href="blogfriends.php?page='</span>.($i+1).<span>'">'</span>.($i+1).<span>'</a></li>'</span>;
                    }
                }
            <span>echo</span><span>'</ul>'</span>;
        <span>echo</span><span>'</div>'</span>;

    }
    <span>else</span> <span>if</span>($pageType == 2)
    {
        <span>echo</span> <span>'<div id="pagetext">'</span>;
            <span>echo</span> <span>'<ul>'</span>;
                <span>echo</span> <span>'<li>'</span>.$page.<span>'/'</span>.$pageTotal.<span>'页 | </li>'</span>;
                <span>echo</span> <span>'<li>共有<strong>'</span>.$total .<span>'</strong>个会员 | </li>'</span>;
                    <span>// 第一页</span>
                    <span>if</span>($page == 1)
                    {
                        <span>echo</span> <span>'<li>首页 | </li>'</span>;
                        <span>echo</span> <span>'<li>上一页 | </li>'</span>;
                    }
                    <span>else</span>
                    {
                        <span>// $_SERVER["SCRIPT_NAME"]获取当前的脚本名字，方便移植</span>
                        <span>// 也可以自定义常量，常量值和脚本文件名一致</span>
                        <span>echo</span> <span>'<li><a href="'</span>.$_SERVER[<span>"SCRIPT_NAME"</span>].<span>'">首页 </a>| </li>'</span>;
                        <span>echo</span> <span>'<li><a href="'</span>.$_SERVER[<span>"SCRIPT_NAME"</span>].<span>'?page='</span>.($page - 1).<span>'">上一页 </a>| </li>'</span>;
                    }
                    <span>// 最后一页</span>
                    <span>if</span>($page == $pageTotal)
                    {
                        <span>echo</span> <span>'<li>下一页 | </li>'</span>;
                        <span>echo</span> <span>'<li>尾页 | </li>'</span>;
                    }
                    <span>else</span>
                    {
                        <span>echo</span> <span>'<li><a href="'</span>.$_SERVER[<span>"SCRIPT_NAME"</span>].<span>'?page='</span>.($page + 1).<span>'">下一页 </a>| </li>'</span>;
                        <span>echo</span> <span>'<li><a href="'</span>.$_SERVER[<span>"SCRIPT_NAME"</span>].<span>'?page='</span>.($pageTotal).<span>'">尾页 </a>| </li>'</span>;
                    }        
            <span>echo</span> <span>'</ul>'</span>;
        <span>echo</span> <span>'</div>'</span>;
    }
}</span>

<span>// 分页参数分装</span><span>
<span>/**</span>
<span>*   $sql   可以 获取数据总数的一个sql语句</span>
<span>*  $size  每一页显示条数</span>
<span>*/</span>
<span>function</span> pageParam($sql,$size)
{
    <span>// 将所有涉及的参数设置全局变量</span>
    <span>// $pagestart  某一页从哪里开始</span>
    <span>// $total  总记录数   $page  某一页  $pageTotal  总页数</span>
    <span>global</span> $pagestart,$pagesize,$total,$page,$pageTotal;
    $pagesize = $size;
    <span>// 获取数据总数</span>
    $total = mysql_num_rows(queryDB($sql));

    <span>// 错误处理，先判断是否存在</span>
    <span>if</span>(<span>isset</span>($_GET[<span>'page'</span>]))
    {
        <span>// 具体某一页</span>
        $page = $_GET[<span>'page'</span>];
        <span>// 判断是否为空(0是空)/小于0/是否是数字</span>
        <span>if</span>(<span>empty</span>($page) || $page < 0 || !is_numeric($page))
        {
            $page = 1;
        }
        <span>else</span>
        {
            $page = intval($page);  <span>//取整，防止小数出现</span>
        }
        
    }
    <span>else</span>
    {
        <span>// 初始化显示第1页</span>
        $page = 1;
    }

    <span>// 数据库清零</span>
    <span>if</span>($total == 0)
    {
        <span>// 设置为1</span>
        $pageTotal = 1;
    }
    <span>else</span>
    {
        <span>// 分页的总页数(进一取整处理)</span>
        $pageTotal = ceil($total / $pagesize);
    }

    <span>// 页数大于总页码$total</span>
    <span>if</span>($page > $pageTotal)
    {
        $page = $pageTotal;
    }
    <span>// 当页从某一条记录开始</span>
    $pagestart = ($page - 1) * $pagesize;
}</span>

<span>/**</span><span>
<span>*  第一个  可以 获取数据总数的一个sql语句</span>
<span>*  第二个  每一页显示条数</span>
<span>*/</span>
pageParam(<span>"select userid from user"</span>,2);</span>

<span><?php 
    <span>// 分页类型 1是数字分页  2是文本分页</span>
      paging(2);
?>    </span>

<span><?php 
       <span>// 分页类型 1是数字分页  2是文本分页</span>
        paging(1);
 ?>    </span>