function getnavhtml($pagenum,$pagesize,$rowcount,$navurl){ 
$pagecount = (int)($rowcount/$pagesize); //总页数 
if ($rowcount % $pagesize >0){ 
$pagecount++; 
} 
if ($pagenum>$pagecount){ 
$pagenum = 1; 
} 
$firstnav = "<a href="{$navurl}page=1">首页</a> "; 
$lastnav = "<a href="{$navurl}page={$pagecount}">尾页</a> "; 
$prevnav=""; 
$nextnav=""; 
if ($pagenum>1){ 
$navpagenum = $pagenum-1; 
$prevnav = "<a href="{$navurl}page={$navpagenum}">上一页</a> "; 
} 
if ($pagenum<$pagecount && $pagecount>1){ 
$navpagenum = $pagenum+1; 
$nextnav = "<a href="{$navurl}page={$navpagenum}">下一页</a> "; 
} 
$amongnav="";
//关键循环
for ($i=1;$i<=5;$i++){ 
$navpagenum = $pagenum+ $i-3; 
if ($navpagenum>0 && $navpagenum<=$pagecount){ 
$navcss教程 = $navpagenum == $pagenum?" class="hover"":""; 
$amongnav.="<a href="{$navurl}page={$navpagenum}" $navcss>{$navpagenum}</a> "; 
} 
} 
return $firstnav.$prevnav.$amongnav.$nextnav.$lastnav." ".$pagenum."/".$pagecount." 共有[".$rowcount."]条数据"; 
} 
}

/**
* 获取页码导航html
* @param $pagenum：当前页码
* @param $pagesize：每页数量
* @param $rowcount：记录总数
* @param $navurl：链接页面url
*/

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