PHP 페이징 원리 간단한 페이징 코드 요약

//定每页显示多少条
//count(*)查询总条数
//计算总页数ceil()
//判断$_GET 并赋值当前页数
//mysql查询 limit (当前页数-1)*每页条数,每页条数
//如果总条数不为空，进行循环mysql_fetch_array()
//$_SERVER['PHP_SELF']
//上一页?page=当前页-1
//下一页?page=当前页 1
//edit: bbs.it-home.org
include("conn.php");
$perpagenum = 3;
$total = mysql_fetch_array(mysql_query("SELECT COUNT(*) FROM message"));
$Total = $total[0];
$Totalpage =ceil($Total/$perpagenum);
if(!isset($_GET['page'])||!intval($_GET['page'])||$_GET['page']>$Totalpage){
    $page = 1;
}else{
    $page = $_GET['page'];
}
$start = ($page-1)*$perpagenum;
$sql = "SELECT * FROM message ORDER BY id DESC LIMIT $start,$perpagenum";
$result = mysql_query($sql);
$contents = mysql_fetch_array($result);
?>

if($total){    do{   $user = $contents['user'];   $contact = $contents['contact'];   $content = $contents['content'];   $date    = $contents['date'];?> }//php分页开始while($contents=mysql_fetch_array($result));$per = $page-1;$next= $page 1;echo "共有".$Total."条留言，每页".$perpagenum."条，共".$page."/".$Totalpage."页。";if($page!=1){ echo "首页"."上一页";}if($page!=$Totalpage){ echo "下一页";echo "尾页";}?>}?>








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