PHP+Mysql development paging jump

<html>
 <head>
     <meta http-equiv="CONTENT-TYPE" content="text/html;">
 </head>
 <body>
 <?php
 /** 1.传入页面 **/
 $page = $_GET['p'];
 /** 2.根据页面取出数据：php->mysql **/
 $host = "localhost";
 $username = 'root';
 $password = '123456789';
 $db = 'bbs2';
 $PageSize=5;
 $ShowPage=3;
 //连接数据库
 $conn = mysql_connect($host, $username, $password);
 if(!$conn){
     echo "数据库连接失败";
     exit;
 }
 
 //选择所要操作的数据库
 mysql_select_db($db);
 //设置数据库编码格式
 mysql_query('SET NAMES UTF8');
 //编写sql获取分页数据：SELECT * FROM 表名 LIMIT 起始位置 , 显示条数
 $sql = "SELECT*FROM test LIMIT ".($page-1)*$PageSize .",$PageSize";
 if(!$sql){
     echo "取出不成功";
 };
 //把sql语句传送到数据库
 $result = mysql_query($sql);
 //处理我们的数据
 echo "<table border=1 cellspacing=0 width=15% >";
 echo "<tr><td>ID</td><td>名字</td><td>性别</td></tr>";
 while($row = mysql_fetch_assoc($result)){
     echo "<tr>";
     echo "<td>{$row['id']}</td>";
     echo "<td>{$row['name']}</td>";
     echo "<td>{$row['sex']}</td>";
     echo "<tr>";
 }
 echo "</table>";
 //释放结果
 mysql_free_result($result);
 //获取数据总数
 $to_sql="SELECT COUNT(*)FROM test";
 $to_result=mysql_fetch_array(mysql_query($to_sql));
 $to=$to_result[0];
 //计算页数
 $to_pages=ceil($to/$PageSize);
 mysql_close($conn);
 /** 3.显示数据+分页条 **/
 $page_banner="";
 //计算偏移量
 $pageffset=($ShowPage-1)/2;
 if($page>1){
     $page_banner.="<a href='".$_SERVER['PHP_SELF']."?p=1'>首页</a>";
     $page_banner.="<a href='".$_SERVER['PHP_SELF']."?p=".($page-1)."'>上一页</a>";
 }
 //初始化数据
 $start=1;
 $end=$to_pages;
 if ($to_pages>$ShowPage){
     if($page>$pageffset+1){
         $page_banner.="...";
     }
     if ($page>$pageffset){
         $start=$page-$pageffset;
         $end=$to_pages>$page+$pageffset?$page+$pageffset:$to_pages;
     }else{
         $start=1;
         $end=$to_pages>$ShowPage?$ShowPage:$to_pages;
     }
     if ($page+$pageffset>$to_pages){
         $start=$start-($page+$pageffset-$end);
     }
 }
 for($i=$start;$i<=$end;$i++){
     $page_banner.="<a href='".$_SERVER['PHP_SELF']."?p=".($i)."'>{$i}</a>";
 }
 //尾部省略
 if ($to_pages>$ShowPage&&$to_pages>$page+$pageffset){
     $page_banner.="...";
 }
 if ($page<$to_pages){
     $page_banner.="<a href='".$_SERVER['PHP_SELF']."?p=".($page+1)."'>下一页</a>";
     $page_banner.="<a href='".$_SERVER['PHP_SELF']."?p=".($to_pages)."'>尾页</a>";
 }
 
 $page_banner.="共{$to_pages}页";
 $page_banner.="<form action='mupage.php' method='get'>";
 $page_banner.="到第<input type='text'size='2'name='p'>页";
 $page_banner.="<input type='submit'value='确定'>";
 $page_banner.="</form>";
 echo $page_banner;
 ?>
 </body>
 </html>

In addition to clicking one by one above, we can add jump options

$page_banner.="<form action='mupage.php' method='get'>";
 $page_banner.="到第<input type='text'size='2'name='p'>页";
 $page_banner.="<input type='submit'value='确定'>";
 $page_banner.="</form>";

Submit the value of p through get method. Jump to different pages

Continuing Learning

new file

<html> <head> <meta http-equiv="CONTENT-TYPE" content="text/html;"> </head> <body> <?php /** 1.传入页面 **/ $page = $_GET['p']; /** 2.根据页面取出数据：php->mysql **/ $host = "localhost"; $username = 'root'; $password = '123456789'; $db = 'bbs2'; $PageSize=5; $ShowPage=3; //连接数据库 $conn = mysql_connect($host, $username, $password); if(!$conn){ // echo "数据库连接失败"; exit; } //选择所要操作的数据库 mysql_select_db($db); //设置数据库编码格式 mysql_query('SET NAMES UTF8'); //编写sql获取分页数据：SELECT * FROM 表名 LIMIT 起始位置 , 显示条数 $sql = "SELECT*FROM test LIMIT ".($page-1)*$PageSize .",$PageSize"; if(!$sql){ echo "取出不成功"; }; //把sql语句传送到数据库 $result = mysql_query($sql); //处理我们的数据 echo "<table border=1 cellspacing=0 width=15% >"; echo "<tr><td>ID</td><td>名字</td><td>性别</td></tr>"; while($row = mysql_fetch_assoc($result)){ echo "<tr>"; echo "<td>{$row['id']}</td>"; echo "<td>{$row['name']}</td>"; echo "<td>{$row['sex']}</td>"; echo "<tr>"; } echo "</table>"; //释放结果 mysql_free_result($result); //获取数据总数 $to_sql="SELECT COUNT(*)FROM test"; $to_result=mysql_fetch_array(mysql_query($to_sql)); $to=$to_result[0]; //计算页数 $to_pages=ceil($to/$PageSize); mysql_close($conn); /** 3.显示数据+分页条 **/ $page_banner=""; //计算偏移量 $pageffset=($ShowPage-1)/2; if($page>1){ $page_banner.="<a href='".$_SERVER['PHP_SELF']."?p=1'>首页</a>"; $page_banner.="<a href='".$_SERVER['PHP_SELF']."?p=".($page-1)."'>上一页</a>"; } //初始化数据 $start=1; $end=$to_pages; if ($to_pages>$ShowPage){ if($page>$pageffset+1){ $page_banner.="..."; } if ($page>$pageffset){ $start=$page-$pageffset; $end=$to_pages>$page+$pageffset?$page+$pageffset:$to_pages; }else{ $start=1; $end=$to_pages>$ShowPage?$ShowPage:$to_pages; } if ($page+$pageffset>$to_pages){ $start=$start-($page+$pageffset-$end); } } for($i=$start;$i<=$end;$i++){ $page_banner.="<a href='".$_SERVER['PHP_SELF']."?p=".($i)."'>{$i}</a>"; } //尾部省略 if ($to_pages>$ShowPage&&$to_pages>$page+$pageffset){ $page_banner.="..."; } if ($page<$to_pages){ $page_banner.="<a href='".$_SERVER['PHP_SELF']."?p=".($page+1)."'>下一页</a>"; $page_banner.="<a href='".$_SERVER['PHP_SELF']."?p=".($to_pages)."'>尾页</a>"; } $page_banner.="共{$to_pages}页"; $page_banner.="<form action='mupage.php' method='get'>"; $page_banner.="到第<input type='text'size='2'name='p'>页"; $page_banner.="<input type='submit'value='确定'>"; $page_banner.="</form>"; echo $page_banner; ?> </body> </html>

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PHP+Mysql development paging jump

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