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PHP+Mysql development of paging: writing page numbers to obtain data

<?php
 /**1,傳入頁碼**/
$page = $_GET["p"];
 /**2,根據(jù)頁碼取出數(shù)據(jù):php->mysql的處理**/
 $host = "localhost";
 $username = "root";
 $password = "123456789";
 $db = "bbs2";
 //連接數(shù)據(jù)庫
 $conn = mysql_connect($host,$username,$password);
 if (!$conn) {
     echo "數(shù)據(jù)庫連接失敗";
     exit;
 }
 //選擇要操作的數(shù)據(jù)庫
 mysql_select_db($db);
 //設(shè)置數(shù)據(jù)庫編碼格式
 mysql_query("SET NAMES UTF8");
 //編寫sql獲取分頁數(shù)據(jù)SELECT * FROM 表名 LIMIT 起始位置,顯示條數(shù)
 $sql = "select * from test limit ".($page-1) * 5 .",5 ";
 //把sql語句傳送到數(shù)據(jù)中
 $result = mysql_query($sql);
 //處理數(shù)據(jù)
 echo "<table border=1 cellspacing=0 width=15%>";
 echo "<tr><td>ID</td><td>名字</td><td>性別</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>";
 }
 ?>

QQ截圖20161130160025.png

Because the default page number has not been added, to observe the effect, you need to add ?p=1 after the address for access.

QQ截圖20161026150712.png

Code explanation:

$page= $_GET['p']; where p is What is the function



Use the get method to pass it through the url, and p is used to pass the determined page number.

QQ截圖20161026150640.png

$host = "localhost";
 $username = 'root';
 $password = '123456789';
 $db = 'bbs2';
 //連接數(shù)據(jù)庫
 $conn = mysql_connect($host, $username, $password);
 if(!$conn){
     echo "數(shù)據(jù)庫連接失敗";
     exit;

Configure the database login file and connect to the database.

//選擇所要操作的數(shù)據(jù)庫
 mysql_select_db($db);
 //設(shè)置數(shù)據(jù)庫編碼格式
 mysql_query('SET NAMES UTF8');
 //編寫sql獲取分頁數(shù)據(jù):SELECT * FROM 表名 LIMIT 起始位置 , 顯示條數(shù)
 $sql = "SELECT*FROM test LIMIT ".($page-1)*$PageSize .",$PageSize";
 if(!$sql){
     echo "取出不成功";
 };
 //把sql語句傳送到數(shù)據(jù)庫
 $result = mysql_query($sql);
 //處理我們的數(shù)據(jù)
 echo "<table border=1 cellspacing=0 width=15%>";
 echo "<tr><td>ID</td><td>名字</td><td>性別</td></tr>";
 while($row = mysql_fetch_assoc($result)){
     echo "<tr>";
     echo "<td>{$row['id']}</td>";
     echo "<td>{$row['name']}</td>";
     echo "<td>{$row['sex']}</td>";
     echo "<tr>";
 }
 echo "</table>";
 echo "</div>";
 //釋放結(jié)果
 mysql_free_result($result);
$sql = "SELECT*FROM test LIMIT ".($page-1)*$PageSize .",$PageSize";

SQL statement

"SELECT*FROM test LIMIT ".($page-1)*5 .",5 ";

(Current page number - 1) The number of data displayed on the page

Get the paging data from the database and display it

And close the database to release the connection.

QQ截圖20161026151038.png

Continuing Learning
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<?php /**1,傳入頁碼**/ $page = $_GET["p"]; /**2,根據(jù)頁碼取出數(shù)據(jù):php->mysql的處理**/ $host = "localhost"; $username = "root"; $password = "123456789"; $db = "bbs2"; //連接數(shù)據(jù)庫 $conn = mysql_connect($host,$username,$password); if (!$conn) { //echo "數(shù)據(jù)庫連接失敗"; exit; } //選擇要操作的數(shù)據(jù)庫 mysql_select_db($db); //設(shè)置數(shù)據(jù)庫編碼格式 mysql_query("SET NAMES UTF8"); //編寫sql獲取分頁數(shù)據(jù)SELECT * FROM 表名 LIMIT 起始位置,顯示條數(shù) $sql = "select * from test limit ".($page-1) * 5 .",5 "; //把sql語句傳送到數(shù)據(jù)中 $result = mysql_query($sql); //處理數(shù)據(jù) echo "<table border=1 cellspacing=0 width=15%>"; echo "<tr><td>ID</td><td>名字</td><td>性別</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>"; } ?>
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