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PHP pagination sample code_PHP tutorial

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Release: 2016-07-21 15:56:13
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/*
需求,建立一个test数据库,在里边建一个test表,里面就
只要id字段,输入一下数据就可以啦。。
由于水平有限,难免出错。。
*/
$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
 
 
   
     
   
 
     echo "共计$totalRows1条记录"; 
     echo "".$page.""."/".$totalpages."页 ";  
    //实现 << < 1 2 3 4 5> >> 分页链接 
    $pre = $page - 1;//上一页 
    $next = $page + 1;//下一页 
    $maxpages = 4;//处理分页时 << < 1 2 3 4 > >>显示4页 
    $pagepre = 1;//如果当前页面是4,还要显示前$pagepre页,如<< < 3 /4/ 5 6 > >> 把第3页显示出来 
    if($page != 1) { echo "<< "; 
    echo "< ";} 
    if($maxpages>=$totalpages) //如果总记录不足以显示4页 
    {$pgstart = 1;$pgend = $totalpages;}//就不所以的页面打印处理 
    elseif(($page-$pagepre-1+$maxpages)>$totalpages)//就好像总页数是6,当前是5,则要把之前的3 4 显示出来,而不仅仅是4 
    {$pgstart = $totalpages - $maxpages + 1;$pgend = $totalpages;} 
    else{ 
    $pgstart=(($page<=$pagepre)?1:($page-$pagepre));//当前页面是1时,只会是1 2 3 4 > >>而不会是 0 1 2 3 > >> 
    $pgend=(($pgstart==1)?$maxpages:($pgstart+$maxpages-1)); 
    } 
    for($pg=$pgstart;$pg<=$pgend;$pg++){ //跳转菜单
if($pg == $page) echo "$pg "; 
    else echo "$pg "; 
    } 
    if($page != $totalpages) 
    {echo "> "; 
    echo ">> ";} 
    ?> 
       
    
 
 
 
    
没有任何记录
 
   
   
🎜>mysql_free_result($result1);
mysql_free_result($result);
?>



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