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There is a data table hacker in the database, now we need to query the data in the hacker table And displayed on the page, the code is as follows:
<?php // 连接数据库 $mysqli = mysqli_connect("localhost","root","123",'student'); //mysqli_close($con); $mysqli ? print 'yes!<br>':print "no!<br>"; $sql = $mysqli -> query('use student'); $sql = $mysqli -> query('set name utf8'); // 创建数据表 $sql = $mysqli -> query("create table hacker( id char(6) not null, name char(8) not null, chinese float not null, math float not null, english float not null )"); if($sql == true){ echo '成功创建hacker表!<br>'; }else{ echo '创建hacker表失败!'.$mysqli->error.'<br>'; } // 添加数据——hacker // $sql = "insert into hacker values('1','张三','10','20','30');"; // $sql .= "insert into hacker values('2','李四','66','77','88');"; // $sql .= "insert into hacker values('3','王二','55','44','33');"; // $sql .= "insert into hacker values('4','麻子','22','55','77')"; // $rows = $mysqli->affected_rows; // if($rows == 3){ // echo "添加数据成功。<br>"; // }else{ // echo '添加失败。'.$mysqli->error."<br>"; // } $sql = $mysqli -> query("insert into hacker values('2','李四','66','77','88') "); $rows = $mysqli->affected_rows; if($rows == 1){ echo "添加数据成功。<br>"; }else{ echo '添加失败。'.$mysqli->error."<br>"; } $sql = $mysqli -> query("insert into hacker values('3','王二','55','44','33') "); $rows = $mysqli->affected_rows; if($rows == 1){ echo "添加数据成功。<br>"; }else{ echo '添加失败。'.$mysqli->error."<br>"; } $sql = $mysqli -> query("insert into hacker values('4','麻子','22','55','77') "); $rows = $mysqli->affected_rows; if($rows == 1){ echo "添加数据成功。<br>"; }else{ echo '添加失败。'.$mysqli->error."<br>"; } // 数据查询 $sql = $mysqli->query("select * from hacker"); if($sql){ // echo '有数据!<br>'; $rows = $sql->num_rows; echo '查询结果共有'.$rows.'条记录<br>'; echo "<table> <tr> <th>序号</th> <th>姓名</th> <th>语文</th> <th>数学</th> <th>英语</th> <tr> "; if($rows){ while($row = $sql->fetch_assoc()){ // echo 'id = '.$row['id'].'<br>name = '.$row['name'].'<br>chinese = '.$row['chinese'].'<br>math = '.$row['math'].'<br>english = '.$row['english'].'<br>'; echo "<tr> <td>".$row['id']."</td> <td>".$row['name']."</td> <td>".$row['chinese']."</td> <td>".$row['math']."</td> <td>".$row['english']."</td> </tr> "; } echo "</table>"; }else{ echo '没有您要找的数据。<br>'; } }else{ echo 'MySQL语句有误。<br>'.$mysqli->error.'<br>'; }?>
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