Newbie try-php paging example code-PHP Tutorial-php.cn

Newbie try-php paging example code

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Release： 2016-07-25 09:05:21

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/*
test数据库，一个test表，唯一字段Id，作为测试使用
@link http://bbs.it-home.org
*/
$conn = mysql_connect("localhost","root","");
$maxnum = 2; //每页显示记录条数
mysql_select_db("test", $conn);
$query1 = "SELECT COUNT(*) AS totalrows FROM test ";
$result1 = mysql_query($query1, $conn) or die(mysql_error());
$row1 = mysql_fetch_assoc($result1);
$totalRows1 = $row1['totalrows']; //数据集数据总条数
$totalpages = ceil($totalRows1/$maxnum);//计算可分页总数，ceil()为上舍函数
if(!isset($_GET['page']) || !intval($_GET['page']) || $_GET['page'] > $totalpages) $page = 1; //对3种出错进行默认处理
//在url参数page不存在时，page不为10进制数时，page大于可分页数时，默认为1
else $page = $_GET['page'];
$startnum = ($page - 1)*$maxnum; //从数据集第$startnum条开始取，注意数据集是从0开始的
$query = "SELECT * FROM test LIMIT $startnum,$maxnum";//选择出符合要求的数据从$startnum条数据开始，选出$maxnum行
$result = mysql_query($query, $conn) or die(mysql_error());
$row = mysql_fetch_assoc($result);
?>
分页示例
do {
?>

分页示例

< ;/table>

echo "Total$totalRows1records";

echo ""."/".$totalpages."page";

//Implementation<< < 1 2 3 4 5> >> Pagination link

$pre = $page - 1;//Previous page

$next = $page + 1;//Next page

$maxpages = 4;//When processing paging<< < 1 2 3 4 > > >Display 4 pages

$pagepre = 1;//If the current page is 4, the previous $pagepre page should also be displayed, such as << < 3 /4/ 5 6 > >> Display it

if($page != 1) { echo "<< ";

echo "< a href='".$_SERVER['PHP_SELF'].'?page='.$pre."'>< ";}

if($maxpages>=$totalpages) //if The total records are not enough to display 4 pages

{$pgstart = 1;$pgend = $totalpages;}//There is no page printing process

elseif(($page-$pagepre-1+$maxpages)>$totalpages) //Just like the total number of pages is 6 and the current number is 5, the previous 3 4 should be displayed, not just 4

{$pgstart = $totalpages - $maxpages + 1;$pgend = $totalpages;}

else{

$pgstart=(($page<=$pagepre)?1:($page-$pagepre));//When the current page is 1, it will only be 1 2 3 4 > >> instead of will be 0 1 2 3 > >>

$pgend=(($pgstart==1)?$maxpages:($pgstart+$maxpages-1));

}

for($pg=$pgstart;$ pg<=$pgend;$pg++){ //Jump menu

if($pg == $page) echo "$pg ";

else echo "$pg ";

}

if($page != $totalpages)

{echo "> ";

echo "> ;> ";}