PHP操作MySQL数据库，实现查询数据并输出到web页面

MySQL数据库如何实现查询数据并输出到web页面 ？数据库中有数据表hacker，现在我们要将hacker表中的数据查询出来并在页面上显示，下面PHP爱好者分享PHP操作MySQL数据库，实现查询数据并输出到web页面方法，希望对大家有所帮助。

PHP操作MySQL数据库，实现查询数据并输出到web页面

代码如下：
    // 连接数据库
    $mysqli = mysqli_connect("localhost","root","123",'student');     //mysqli_close($con);
    $mysqli ? print 'yes!
':print "no!
";
 
    $sql = $mysqli -> query('use student');
    $sql = $mysqli -> query('set name utf8');
 
    // 创建数据表
    $sql = $mysqli -> query("create table hacker(
        id char(6) not null,
        name char(8MySQL数据库) not null,
        chinese float not null,
        math float not null,
        english float not null
    )");
    if($sql == true){
        echo '成功创建hacker表！
';
    }else{
        echo '创建hacker表失败！'.$mysqli->error.'
';
    }
 
    // 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。
";
    // }else{
    //     echo '添加失败。'.$mysqli->error."
";
    // }
 
    $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。
";
    }else{
        echo '添加失败。'.$mysqli->error."
";
    }
    $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。
";
    }else{
        echo '添加失败。'.$mysqli->error."
";
    }
    $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。
";
    }else{
        echo '添加失败。'.$mysqli->error."
";
    }
 
    // 数据查询
    $sql = $mysqli->query("select * from hacker");
    if($sql){
        // echo '有数据！
';
        $rows = $sql->num_rows;
        echo '查询结果共有'.$rows.'条记录
';
        echo "
                
                    
                    
                    
                    
                    
                
        ";
 
        if($rows){
            while($row = $sql->fetch_assoc()){
                // echo 'id = '.$row['id'].'
name = '.$row['name'].'
chinese = '.$row['chinese'].'
math = '.$row['math'].'
english = '.$row['english'].'
';
                echo "
                            
                            
                            
                            
                            
                    
                ";
            }
            echo "

序号

姓名

语文

数学

英语

";
        }else{
            echo '没有您要找的数据。
';
        }
    }else{
        echo 'MySQL语句有误。
'.$mysqli->error.'
';
    }?>