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覆巢之下焉有完卵。出来道上混,迟早是要还的。

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一个学员写的PHP列表分页函数

2012-02-04 20:39:44| 分类： PHP | 标签： |举报 |字号大中小订阅

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使用方法,请把以下代码复制到一个记事本文件里,然后把记事本改名为page.php,用php开发工具打开就可以看到效果

<?php
function genpage(&$sql,$page_size=10)
{
      global $prepage,$nextpage,$pages,$sums; //out param
      $page = $_GET["page"];
      $eachpage = $page_size;
      $pagesql = strstr($sql," from ");
      $pagesql = "select count(*) as ids ".$pagesql;
      $result = mysql_query($pagesql);
      if($rs = mysql_fetch_array($result)) $sums = $rs[0];
      $pages = ceil(($sums-0.5)/$eachpage)-1;
      $pages = $pages>=0?$pages:0;
      $prepage = ($page>0)?$page-1:0;
      $nextpage = ($page<$pages)?$page+1:$pages;
      $startpos = $page*$eachpage;
      $sql .=" limit $startpos,$eachpage ";
}
function showpages()
{
    global $page,$pages,$prepage,$nextpage,$sums,$queryString; //param from genpage function
    $shownum =4/2;
$page=$_GET["page"];//这个是用来接收点击的页码
    $startpage = ($page>=$shownum)?$page-$shownum:0;
    $endpage = ($page+$shownum<=$pages)?$page+$shownum:$pages;


    if($page>0){$page_str.="<a href=$PHP_SELF?page=0>首页</a> <a href=$PHP_SELF?page=".($page-1).$queryString.">上一页</a>";}
    if($startpage>0){$page_str.= "<b><a href=$PHP_SELF?page=".($page-$shownum*2).$queryString." title='上五页'>«</a></b>";}
    for($i=$startpage;$i<=$endpage;$i++)
    {
        if($i==$page){
  $page_str.= " <b>[".($i+1)."]</b> ";
  }else{
  $page_str.= " <a href=$PHP_SELF?page=$i>".($i+1)."</a> ";
  }
    }
    if($endpage<$pages){$page_str.="<b><a href=$PHP_SELF?page=".($page+$shownum*2).$queryString." title='下五页'>»</a></b>";}
    if($page<$pages){$page_str.="<a href=$PHP_SELF?page=".($page+1).$queryString.">下一页</a> <a href=$PHP_SELF?page=$pages>尾页</a>";}

//分页函数调用示例：
// $sql="select * from hengbodb";
// genpage($sql,6);//分页效果，只需在sql语句下边调用此函数即可

// $queryString="name=hengbo&huaidan=duanyi";//额外参数
// showpage();//显示页码
?>

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